Blood drawn from nine people in the earliest days of the pandemic tested positive for the infection. But some experts questioned the results.
Author: APOORVA MANDAVILLI
The C.D.C.’s New Leader Follows the Science. Is That Enough?
By all accounts, Dr. Rochelle Walensky is a fierce advocate and an empathetic scientist. But C.D.C. advice must be better attuned to the real world, critics say.
A Multibillion-Dollar Plan to End Polio, and Soon
A global partnership announced plans to spend more than $5 billion to eradicate poliovirus.
A U.N. Declaration on Ending AIDS Should Have Been Easy. It Wasn’t.
Even with U.N.’s previous goals unmet, delegates tried to water down provisions regarding protections for vulnerable populations and patents for essential drugs.
Teens Are Rarely Hospitalized With Covid, but Cases Can Be Severe
Adolescents were hospitalized with Covid three times as often as with flu, researchers reported. Nearly one-third wound up in I.C.U.s.
A Vaccine Side Effect Leaves Women Wondering: Why Isn’t the Pill Safer?
Scientists were alarmed by blood clots possibly linked to the J&J vaccine. Some women wondered if there shouldn’t be more concern about oral contraceptives.
Immunity to the Coronavirus May Persist for Years, Scientists Find
Important immune cells survive in the bone marrow of people who were infected with the virus or were inoculated against it, new research suggests.
Why the CDC Changed Its Advice on Masks
Two scientific findings altered the calculus: Vaccinated people rarely transmit the virus, and the shots are effective against variants.
Covid Pandemic Demands Air Quality Changes in the Workplace, Researchers Say
The researchers issued a call to action to improve indoor air quality as a safeguard against the spread of contagions like the coronavirus.
C.D.C. Advisers Endorse Pfizer Vaccine for Children Ages 12 to 15
Immunizations will quickly begin nationwide, officials predicted.