China’s New Testing Policy for Travelers Is Problematic, Experts Say

As cases of the coronavirus continue to climb worldwide, many countries are doubling down on testing policies that can grant or bar entry to travelers attempting to move across international borders. But an unusual new testing policy, announced by China at the end of October, has health experts baffled. It requires inbound travelers to present negative results from an antibody […]

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What Does ‘Negative’ on a Coronavirus Test Really Mean?

President Trump’s recent tests are a reminder that although many products exist, none test for infectiousness. By Katherine J. Wu In a flurry of memos released this week and last, the White House physician, Dr. Sean Conley, stated that President Trump no longer posed a transmission risk to others — an assessment, he noted, that was largely precipitated by the results […]

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Nevada Revokes Halt on Rapid Antigen Testing in Nursing Homes

The reversal came just hours after the federal government threatened the state, calling the prohibition on the tests “illegal.” By Katherine J. Wu Under pressure from the federal government, Nevada health officials on Friday rescinded a statewide order directing nursing homes to halt the use of two government-issued rapid coronavirus tests that the state had deemed to be inaccurate. The […]

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New York Will Test the Dead More Often for Coronavirus and Flu

New regulations require a ramp-up in testing for patients with symptoms, as well as people who weren’t tested before they died. By Katherine J. Wu Cough, fever, chills — with fall fast on the way, symptoms alone won’t be useful in distinguishing Covid-19 from similar-looking cases of the flu. That means routinely testing for both viruses will be crucial — […]

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Did Federal Officials Really Question W.H.O. Tests for Coronavirus?

Dr. Birx answered that tests in the United States were now being made by many producers, which is correct. Differing diagnostic tests are now made by state laboratories, medical school laboratories and private companies like Thermo Fisher, which she mentioned as an example. Dr. Birx said she was strongly urging commercial providers to get their tests out, but of course, […]

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Your Nose Itches. Is It Allergies, Flu or the Coronavirus?

“There’s a feeling of overall malaise that is associated with viral infections,” Dr. Adalja said. Except for seasonality, it can be hard to tell the two apart. “Unfortunately, there’s no reliable way to distinguish between early symptoms of the flu and coronavirus,” Dr. Adalja said. “The only way to distinguish the two clinically is with a diagnostic test.” According to […]

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Hospitals Should Replace Infection-Prone Scopes With Safer Models, F.D.A. Says

Companies that make reusable, snakelike cameras to examine patients internally should begin making disposable versions, because the current models cannot be properly sterilized and have spread infections from one patient to another, the Food and Drug Administration said on Thursday. In the meantime, hospitals that use the instruments, called duodenoscopes, should start to transition to models with disposable components to […]

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Scientists Are Gaining Ground Against AIDS

The unnamed “London patient” — the second person apparently cured of H.I.V. — earned all the headlines. But other research released this week at the Conference on Retroviruses and Opportunistic Infections showed that scientists are making slow but steady progress on the tactics and medicines needed to fight the epidemic, especially in Africa. Monthly injections of long-acting H.I.V. drugs proved […]

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