Researchers pushed back after the C.D.C. director asserted that vaccinated people “do not carry the virus.”
Author: APOORVA MANDAVILLI
Pregnancy Complications Have Been Common During the Pandemic, Researchers Say
A review of six million pregnancies in 17 countries found that for many women, childbearing has been unusually risky in the past year, particularly in lower- and middle-income countries.
Virus Variants Can Infect Mice, Scientists Report
Infected rodents pose no immediate danger to humans, but the research suggests that mutations are helping the coronavirus expand its range of potential hosts.
The Pfizer-BioNTech Vaccine Is Said to Be Powerfully Protective in Adolescents
A clinical trial found no symptomatic infections among vaccinated children ages 12 to 15, the companies said, and there were no serious side effects. The data have not yet been reviewed by independent experts.
Florida’s Coronavirus Cases Rise, Especially Among the Young
The state’s open invitation to enjoy spring break is a contributing factor. Another may be the exponential increase of infections of the more contagious B.1.1.7 variant.
Variants and Eased Restrictions Push US Coronavirus Cases Up Again
The country averaged 61,545 cases last week, 11 percent more than the average two weeks earlier.
New Study to Track Transmission Among Vaccinated College Students
More than 12,000 students are being recruited at more than 20 universities across the country.
JAMA Editor Placed on Leave Following Racial Controversy
After a staff member dismissed racism as a problem in medicine on a podcast, a petition signed by thousands demanded a review of editorial processes at the journal.
Pfizer Begins Testing Its Vaccine in Young Children
Other drug makers have begun similar trials of their Covid-19 vaccines. If they work in children younger than 12 as expected, it will be easier for the U.S. to reach herd immunity.
Coronavirus Reinfections Are Rare, Danish Researchers Report
People over 65 are more likely to experience a second bout with the virus, according to a large study of medical records.