Experts said the memo would make it more difficult for the F.D.A. to issue new rules, but it’s unclear how it would affect the vetting of coronavirus vaccines.
Developing an effective vaccine is the first step. Then comes the question of how to deliver hundreds of millions of doses that may need to be kept at arctic temperatures.
He was known for taking on difficult cases, many involving children. An anti-rejection drug he developed led to a scandal, but he was vindicated.
The country’s extensive response has been praised around the world but has led to harassment and slander, raising questions about privacy protections.
The agency now says anyone exposed to an infected person for more than 15 minutes needs a test. An earlier guideline saying it might not be necessary had shocked public health experts.
Emails from a former top Trump health official and his science adviser show how the two refused to accept Centers for Disease Control and Prevention science and sought to silence the agency.
Israel becomes one of the few countries to impose a second nationwide lockdown. In the U.S., Joe Biden tries to focus the campaign on President Trump’s virus performance.
A controversial guideline saying people without Covid-19 symptoms didn’t need to get tested for the virus came from H.H.S. officials and skipped the C.D.C.’s scientific review process.
Blood oxygen readings can be a useful indicator of wellness, but context is important — and so is medical advice from a doctor.
The gap between rates set for private insurers and employers vs. those by the federal government stirs the debate over a government-run health plan.
Infections in Britain have spiked back up to levels not seen in months. After a fire razed a refugee camp in Greece, homeless migrants fear what’s next.
A federal judge ruled that pandemic safety restrictions in Pennsylvania were unconstitutional. The damage to the world’s major economies from the virus has been six times more severe than the 2009 financial crisis.
AstraZeneca’s vaccine trials resume in Britain after a safety review. Michigan State University students are asked to quarantine after an uptick in cases.
New studies provide more evidence that pregnant women may get severe Covid-19 symptoms and have an increased risk of pregnancy loss.
The companies hope to earn the trust of the public and of scientists who have clamored for details of the studies.
Despite the president’s repeated claims that a vaccine will be available in October, scientists, companies and federal officials all say that most people won’t get one until well into next year.
After the loss of an hour from daylight savings, the number of human mistakes increased by almost 20 percent, mostly involving drug errors.
Women with a shorter time between menarche and menopause were at higher risk of cardiovascular disease, heart attack and stroke.
China has been using its prospects for developing a vaccine as a diplomatic carrot. The pandemic has exacerbated the worldwide threat of hunger and malnutrition.
After researchers noticed fewer nearsighted patients in a hospital ward in China, they speculated that wearing glasses might offer some protection against Covid-19.