"Germany changed course on Sunday over which type of smartphone technology it wanted to use to trace coronavirus infections," reports Reuters, "backing an approach supported by Apple and Google along with a growing number of other European countries." Chancellery Minister Helge Braun and Health Minister Jens Spahn said in a joint statement that Berlin would adopt a "decentralised" approach to digital contact tracing, thus abandoning a home-grown alternative that would have given health authorities central control over tracing data.

In Europe, most countries have chosen short-range Bluetooth "handshakes" between mobile devices as the best way of registering a potential contact, even though it does not provide location data. But they have disagreed about whether to log such contacts on individual devices or on a central server -- which would be more directly useful to existing contact tracing teams that work phones and knock on doors to warn those who may be at risk. Under the decentralised approach, users could opt to share their phone number or details of their symptoms -- making it easier for health authorities to get in touch and give advice on the best course of action in the event they are found to be at risk. This consent would be given in the app, however, and not be part of the system's central architecture...

Germany as recently as Friday backed a centralised standard called Pan-European Privacy-Preserving Proximity Tracing (PEPP-PT), which would have needed Apple in particular to change the settings on its iPhones.

When Apple refused to budge there was no alternative but to change course, said a senior government source.
The article notes Germany had also received opposition in a recently-published letter signed by hundreds of scientists.

It had warned that Germany's original plan for centralized tracing would allow "unprecedented surveillance of society at large".

Long-time Slashdot reader RoccamOccam quotes Interesting Engineering: The United States Space force now has offensive power, though it might not be the massive orbiting weapons system that you're envisioning.

The new weapons system delivered to the space force is a jammer type array that can prevent military or intelligence combatants from accessing their military satellites. This functionality allows the space force to neutralize orbiting satellites in a matter of minutes.
The International Business Times adds that "In a previous report, the U.S. identified Russia and China as potential threats to the country's presence in space.

"The U.S. Space Force's recently confirmed that it already has 16 units of its new ground-based offensive weapon system. The agency also reported that it has already started working on the system's successor..."

"SpaceX's Starlink internet satellites will soon sport an accessory to tamp down their surprising brightness," reports Live Science: That brightness worries many astronomers, who say that the huge Starlink constellation could seriously disrupt a variety of scientific observations. And Starlink will indeed be huge, if all goes according to SpaceX's plan: The company has approval to launch 12,000 craft to low Earth orbit (LEO) and has applied for permission to loft 30,000 more. (For perspective, humanity has launched just 9,400 objects to orbit since the dawn of the space age in 1957).

SpaceX founder and CEO Elon Musk has said that the company will find a way to make Starlink craft fade from scientists' sight, predicting that the constellation will end up having no impact whatsoever on astronomical discoveries. SpaceX has been working with the astronomical community to help make this happen, researchers say, and the company has already tried out some mitigation measures. For example, one of the 60 Starlink satellites that launched atop a Falcon 9 rocket this past January sported an experimental coating to make it less reflective. Observations show that this "DarkSat" is considerably dimmer than its brighter Starlink cohorts, but probably not dim enough to quell most astronomers' concerns about the megaconstellation.

But SpaceX is taking additional measures as well, which brings us to the new accessory. Musk tweeted the following on Wednesday (April 22), in response to a Twitter follower who wished SpaceX luck on a 60-satellite Starlink launch that day: "Thanks! We are taking some key steps to reduce satellite brightness btw. Should be much less noticeable during orbit raise by changing solar panel angle & all sats get sunshades starting with launch 9."

U.K. vacuum cleaner company Dyson "said the British government no longer needed the ventilator it had developed from scratch," reports Reuters: Company founder James Dyson said the company had welcomed Prime Minister Boris Johnson's challenge to build ventilators. "Mercifully they are not required, but we don't regret our contribution to the national effort for one moment," he said in a statement.

Dyson said his company had spent around 20 million pounds ($25 million) on the project to date, and would not accept any public money. "I have some hope that our ventilator may yet help the response in other countries, but that requires further time and investigation," he said.

"Australia's coronavirus tracing app, dubbed COVIDSafe, has been released as the nation seeks to contain the spread of the deadly pandemic," reports ABC.net.au: People who download the app will be asked to supply a name, which can be a pseudonym, their age range, a mobile number and post code. Those who download the software will be notified if they have contact with another user who tests positive for coronavirus... Using Bluetooth technology, the app "pings" or exchanges a "digital handshake" with another user when they come within 1.5 metres of each other, and then logs this contact and encrypts it.

The data remains encrypted on a user's phone for 21 days, after which it is deleted if they have not been in contact with a confirmed case. The application will have two stages of consent that people will have to agree to: initially when they download the app so data can be collected, and secondly to release that data on their phone if they are diagnosed with the virus. If a person with the app tested positive to COVID-19, and provided they consent to sharing the information, it will be sent to a central server. From here, state and territory health authorities can access it and start contacting other people who might have contracted coronavirus...

The app is voluntary and it will be illegal to force anyone to download it.
In addition, Australia "will make it illegal for non-health officials to access data collected on smartphone software to trace the spread of the coronavirus," reports Reuters, citing comments Friday by Prime Minister Scott Morrison "amid privacy concerns raised by the measure." Australia has so far avoided the high death toll of other countries, with only 78 deaths, largely as a result of tough restrictions on movement that have brought public life to a standstill. The federal government has said existing "social distancing" measures will remain until at least mid-May, and that its willingness to relax them will depend on whether people download the smartphone "app" to identify who a person with the illness has had contact with...

Morrison also confirmed a local media report which said the data would be stored on servers managed by AWS, a unit of U.S. internet giant Amazon.com Inc, but added that "it's a nationally encrypted data store".
"The spec for it is very privacy-positive," writes Slashdot reader Bleve97, adding "It will be interesting to see what it looks like once it's been disassembled in a sandbox and played with!"

And Slashdot reader betsuin has already installed it (adding that the app "does not require GPS... I've installed, GPS is off on my rooted device."

America's generally pro-Trump media site Fox News felt compelled to report today that "Some poison control centers reported a spike in calls following President Trump's suggestion that injecting disinfectant might help people infected with coronavirus." The comment alarmed medical professionals around the world. The president subsequently claimed on Friday that he was being "sacrastic," although at the press conference he was soberly addressing health experts on the coronavirus task force, urging them to launch a study.

Lysol parent company Reckitt Benckiser issued a statement Friday reminding people that "under no circumstance should our disinfectant products be administered into the human body (through injection, ingestion or any other route)." In Maryland, the Emergency Management Agency received over 100 calls inquiring about the president's suggestion, forcing the service to issue an alert to remind citizens that "under no circumstances should any disinfectant product be administered into the body through injection, ingestion or any other route." Washington State's Emergency Management Division similarly issued a public statement to remind people to not "drink bleach" or "inject disinfectant."

More concerning, though, is the number of people who actually went ahead with the suggestion. In New York City, the Daily News reported that the Poison Control Center saw 30 cases of "exposure to Lysol, bleach and other cleaners in 18 hours after Trump's suggestion" that cleaning products might be used to treat coronavirus. NYC Poison Control saw only 13 such cases in a similar period last year.

Anna Sanders, who wrote the Daily News article, reported that no one died or was hospitalized as a result.
"After raising the idea of putting disinfectant inside people's bodies, Trump cautioned Thursday that he's not a medical expert," reports one New York-based news site.

" 'Maybe you can. Maybe you can't. I'm not a doctor. I'm, like, a person who has a good you-know-what,' Trump said, pointing to his head."

sciencehabit writes: Although tales of people being killed by meteorite impacts date back to biblical times, few have been documented until the past decade or so. Now, Turkish researchers have uncovered the earliest evidence that a meteorite killed one man and paralyzed another when it slammed into a hilltop in what is now Iraq in August 1888.

Documents chronicling the event were found in Turkish state archives, the team reports online today in Meteoritics & Planetary Science. According to one of three letters written by local authorities in the region shortly after the event, the killer meteorite was one of several that fell during a 10-minute interval. Reports of a fireball seen in a city nearby suggest the object approached the area from the southeast before it blew up high in the atmosphere.

"Confirmed coronavirus cases world-wide Friday exceeded 2.7 million, with more than 190,000 dead," reports the Wall Street Journal, citing data from Johns Hopkins University.

While America has just 4.3% of the world's population, "The U.S. accounted for nearly a third of the cases, exceeding 869,000, and more than a quarter of the deaths, at 49,963." [Note: This comparison might be skewed by the number of countries underreporting their cases or deaths.]

The Miami Herald reports: The coronavirus has killed more than 50,000 people in the United States, just four days after passing 40,000 U.S. deaths on Sunday, Johns Hopkins University reports. The total as of early Friday afternoon was more than 50,370, up about 400 deaths since Thursday night, the data shows...

More than 25,000 people have died in Italy, and more than 22,000 in Spain... Most of the U.S. deaths have occurred in New York City: 16,388, the university says.
Two weeks ago America had just 20% of the world's confirmed fatalities.

Amazon is asking warehouse employees who have stayed away from work during the pandemic to return for scheduled shifts beginning May 1, or request a leave of absence. Bloomberg reports: The move sets up a critical choice for employees at a company that has become a lifeline for Americans locked down to contain outbreaks of Covid-19. After the coronavirus began spreading through the U.S., Amazon offered unpaid time off without penalty for workers uncomfortable with coming in, along with $2-an-hour hazard pay for those who report for duty. The offers run through April. In a blog post published Friday, Amazon said it would extend the raise through May 16 but made no mention of unlimited unpaid time off. Amazon said it was "providing flexibility with leave of absence options, including expanding the policy to cover Covid-19 circumstances, such as high-risk individuals or school closures."

President Trump has long pinned his hopes on the powers of sunlight to defeat the Covid-19 virus. He returned to that theme at the White House coronavirus briefing on Thursday, bringing in a science administrator to back up his assertions and eagerly theorizing about treatments involving the use of household disinfectant that would be dangerous if put inside the body, as well as the power of sunlight and ultraviolet light. From a report: After the administrator, William N. Bryan, the head of science at the Department of Homeland Security, told the briefing that the agency had tested how sunlight and disinfectants -- including bleach and alcohol -- can kill the coronavirus on surfaces in as little as 30 seconds, an excited Mr. Trump returned to the lectern. "Supposing we hit the body with a tremendous -- whether it's ultraviolet or just very powerful light," Mr. Trump said. "And I think you said that hasn't been checked, but we're going to test it?" he added, turning to Mr. Bryan, who had returned to his seat. "And then I said, supposing you brought the light inside the body, either through the skin or some other way."

Apparently reassured that the tests he was proposing would take place, Mr. Trump then theorized about the possible medical benefits of disinfectants in the fight against the virus. "And then I see the disinfectant where it knocks it out in a minute -- one minute -- and is there a way we can do something like that by injection inside, or almost a cleaning?" he asked. "Because you see it gets in the lungs and it does a tremendous number on the lungs, so it would be interesting to check that." Experts have long warned that ultraviolet lamps can harm humans if used improperly -- when the exposure is outside the body, much less inside. The link between ultraviolet light and skin cancer is well established. Bleach and other disinfectants may kill microbes but they also can kill humans if swallowed or if fumes are too powerful. That is why bottles of bleach and other disinfectants carry sharp warnings of ingestion dangers.

Citing a "primary outcome" of death, researchers cut short a study testing anti-malaria drug chloroquine as a potential treatment for Covid-19 after some patients developed irregular heart rates and nearly two dozen of them died after taking doses of the drug daily. From a report: Scientists say the findings, published Friday in the peer-reviewed Journal of the American Medical Association, should prompt some degree of skepticism from the public toward enthusiastic claims about and perhaps "serve to curb the exuberant use" of the drug, which has been touted by President Donald Trump as a potential "game-changer" in the fight against the coronavirus. Chloroquine gained widespread international attention following two small studies, including one with 36 Covid-19 patients published March 17 in France, found that most patients taking the drug cleared the coronavirus from their system a lot faster than the control group. The JAMA report said those trials didn't meet the publishing society's standards.

This month, Jaguar Health more than tripled the price of its lone FDA-approved drug, right after asking the federal government to expand the use of its drug to coronavirus patients. AmiMoJo shares a report: Jaguar Health drastically raised the price of a drug during the height of the pandemic, but executives argued the move was needed to stave off the company's collapse. Going into this year, the list price of a 60-pill bottle of Mytesi -- an antidiarrheal medication specifically for people with HIV/AIDS who are on antiretroviral drugs -- was $668.52. On April 9, Jaguar Health raised the price to $2,206.52, according to pricing data from Elsevier's Gold Standard Drug Database. On March 21, Jaguar Health asked the FDA to authorize emergency use of Mytesi for COVID-19 patients who were experiencing any diarrhea or "diarrhea associated with certain antiviral treatments" including remdesivir, among others.

An anonymous reader shares an excerpt from a report via ProPublica: Private equity-backed medical staffing companies that have cut doctors' pay are continuing to spend millions on political ads, according to Federal Communications Commission disclosures. The ads amount to $2.2 million since Health and Human Services Secretary Alex Azar declared a public health emergency on Jan. 31. About $1.2 million has been spent since President Donald Trump's national emergency declaration on March 13, the disclosures show.

The companies behind the ads, TeamHealth and Envision Healthcare, are among the staffing firms that have cut pay and benefits for emergency room doctors and other medical workers. The companies say the cuts are needed to cope with falling income because non-coronavirus patients are avoiding hospitals. Executives at TeamHealth and Envision also took pay cuts. But Envision and TeamHealth have continued to pour money into a joint political ad campaign. Their TV and radio spots are aimed at pressuring lawmakers working to address "surprise billing," where patients get stuck with huge medical costs from out-of-network providers they had no say in choosing. The ads oppose capping out-of-network costs based on median prices in the area. The spending totals don't include digital ads, which aren't reported to the FCC.

An anonymous reader quotes a report from the BBC: The first human trial in Europe of a coronavirus vaccine has begun in Oxford. Two volunteers were injected, the first of more than 800 people recruited for the study. Half will receive the Covid-19 vaccine, and half a control vaccine which protects against meningitis but not coronavirus. The design of the trial means volunteers will not know which vaccine they are getting, though doctors will. The vaccine was developed in under three months by a team at Oxford University. Sarah Gilbert, professor of vaccinology at the Jenner Institute, led the pre-clinical research.

The vaccine is made from a weakened version of a common cold virus (known as an adenovirus) from chimpanzees that has been modified so it cannot grow in humans. The Oxford team has already developed a vaccine against Mers, another type of coronavirus, using the same approach -- and that had promising results in clinical trials. The only way the team will know if the Covid-19 vaccine works is by comparing the number of people who get infected with coronavirus in the months ahead from the two arms of the trial. That could be a problem if cases fall rapidly in the UK, because there may not be enough data. Researchers say they hope to have one million doses ready by September, and to dramatically scale up manufacturing after that, should the vaccine prove effective.

"A larger trial, of about 5,000 volunteers, will start in the coming months and will have no age limit," the report adds. There's also another team at Imperial College London that hopes to begin human trials of its coronavirus vaccine in June.

An anonymous reader quotes a report from IEEE Spectrum: Underwater quantum links are possible across 30 meters (100 feet) of turbulent water, scientists have shown. Such findings could help to one day secure quantum communications for submarines. [...] In the new study, researchers experimented with quantum communications in a "flume tank," a water tank in which scientists can generate waves to mimic the ocean. They also tried two different strategies for quantum communications -- one involving just the polarization of the light, and the other incorporating the polarization and the orbital angular momentum of the signals -- to analyze how quantum communication protocols might differ in maximum distances and data transfer rates.

The researchers achieved quantum communication at up to 72 kilobits per second across up to 30 meters of turbulent water, the longest distance yet reported for such links. Although turbulence did result in significant wandering and distortion of light signals, those error rates didn't prevent quantum links from successfully being established with either communication protocol. Unexpectedly, the researchers found they could keep quantum communication going even while the transmitter moved down the flume tank. "We had expected that this would not be possible without beam-tracking technology," says Felix Hufnagel, a lead author and quantum physicist at the University of Ottawa in Canada. After the scientists analyzed their data, they suggested the maximum distance for secure quantum communications might actually be 80 meters in turbulent water, although this would depend on factors such as the efficiency of the detectors used. Improving such factors might significantly boost the maximum communications distance, they say. The findings have been detailed in a preprint article on April 9.

watha2020 writes: Spot, the four-legged robot made famous by its YouTube dance video, is being tested as a remote triage system at Boston's Brigham Women's Hospital. A Spot robot carrying an iPad allows doctors to interview possibly infected patients at a safe distance. [Spot is also carrying a pouch near the robot's "tail," which allows it to deliver small items such as bottled water to infected patients, without the need to send in a nurse. The report adds that an upgraded model will add cameras that can measure a patient's respiration rate and body temperature, with no need to make physical contact.] An anonymous Slashdot reader also shares news that Boston Dynamics today open-sourced its health care robotics toolkit on GitHub. "The company hopes that existing Boston Dynamics customers and other mobile robot providers can use the toolkit, which includes documentation and CAD files of enclosures and mounts, to help health care workers and essential personnel and ultimately save lives," reports VentureBeat. "The mobile robot provider outlined four use cases for its toolkit: telemedicine (which it has already deployed), remote vitals inspection, disinfection, and delivery."

One of every five New York City residents tested positive for antibodies to the coronavirus, according to preliminary test results described by Gov. Andrew M. Cuomo on Thursday, suggesting the virus had spread far more widely than known. The New York Times reports: The results also provided the tantalizing prospect that many New Yorkers who never knew they had been infected -- possibly as many as 2.7 million, the governor said -- had already encountered the virus, and survived. Mr. Cuomo also suggested the death rate was far lower than believed. The reliability of some early antibody tests to hit the market has been widely questioned, with some -- made in China without Food and Drug Administration approval -- found by health officials to be deeply flawed. Researchers across New York have worked in recent weeks to develop and validate their own, with federal approval.

In New York City, about 21 percent, or one of every five residents, tested positive for coronavirus antibodies during the state survey. The rate was 16.7 percent in Long Island, 11.7 percent in Westchester and Rockland Counties, and 3.6 percent in the rest of the state. Almost 14 percent of those tested in New York were positive, according to preliminary results from the state survey, which sampled approximately 3,000 people over two days at grocery and big-box stores. The governor suggested on Thursday that, based on the survey, the death rate in New York from Covid-19 would likely be far lower than previously believed, possibly 0.5 percent of those infected. On Thursday, Mr. Cuomo did not talk about any potential for immunity among those previously infected.

The biggest assessment of global insect abundances to date shows a worrying drop of almost 25% in the last 30 years, with accelerating declines in Europe that shocked scientists. From a news report: The analysis combined 166 long-term surveys from almost 1,700 sites and found that some species were bucking the overall downward trend. In particular, freshwater insects have been increasing by 11% each decade following action to clean up polluted rivers and lakes. However, this group represent only about 10% of insect species and do not pollinate crops. Researchers said insects remained critically understudied in many regions, with little or no data from South America, south Asia and Africa. Rapid destruction of wild habitats in these places for farming and urbanization is likely to be significantly reducing insect populations, they said. Insects are by far the most varied and abundant animals, outweighing humanity by 17 times, and are essential to the ecosystems humanity depends upon. They pollinate plants, are food for other creatures and recycle nature's waste.

Daniel Oberhaus writes via Wired: Later this summer, physicists at the Argonne and Fermi national laboratories will exchange quantum information across 30 miles of optical fiber running beneath the suburbs of Chicago. One lab will generate a pair of entangled photons -- particles that have identical states and are linked in such a way that what happens to one happens to the other -- and send them to their colleagues at the other lab, who will extract the quantum information carried by these particles of light. By establishing this two-way link, the labs will become the first nodes in what the researchers hope will one day be a quantum internet linking quantum computers around the nation. [...] The problem is that quantum information hates long-distance travel. Send entangled photons out into the real world through optical fiber and, in less than 50 miles, environmental interference will destroy their quantum state. But if the photons were relayed through a satellite instead, they could be sent to destinations hundreds -- and potentially thousands -- of miles away. So in 2018, NASA partnered with MIT's Lincoln Laboratory to develop the technologies needed to make it happen.

The goal of the National Space Quantum Laboratory program, sometimes referred to as Quantum Technology in Space, is to use a laser system on the International Space Station to exchange quantum information between two devices on Earth without a physical link. The refrigerator-sized module would be attached to the outside of the space station and would generate the entangled photons that carry the quantum information to Earth. The demonstration would pave the way for a satellite that could take entangled particles generated in local quantum networks and send them to far-flung locations.

The first pets in the United States, two cats from New York State, have tested positive for the virus that is causing the worldwide pandemic, the Agriculture Department and the Centers for Disease Control announced Wednesday. The New York Times reports: The cats, from different parts of the state, are showing only mild symptoms and are expected to be fine. Testing positive does not mean the cats have the same illness that people have. Nor does it mean that the cats can pass on the illness to people. And tests for pets are not the same as those for people, so no humans missed out on testing because the cats were tested.

Veterinarians took samples from both cats that were tested at a private lab. The test results were then confirmed at a national veterinary lab. The owners brought both cats to veterinarians because they showed symptoms of a respiratory infection. One owner had tested positive for the virus. No human in the other cat's household tested positive. The Agriculture Department and the C.D.C. emphasized that "there is no evidence that pets play a role in spreading the virus in the United States." Other experts agree that people should not start looking at their cats with suspicion. If anything, it's the other way around. The CDC recommends keeping cats indoors. And for people who become sick with COVID-19, they recommend isolating from pets as much as possible, treating them as you would a human being.

"Dogs are less susceptible to infection with the virus," the report notes. "Although there is some evidence that they may have low-level infections, they haven't shown any symptoms. Nonetheless, the C.D.C. recommends that you put dogs on a six-foot leash when walking them, keep them away from other animals and avoid contact as much as possible with any pets if you are sick."