Some scientists believe that a clearer picture of Covid vaccine efficacy could have emerged sooner if investigators had tracked certain immune cells, not just antibodies.
Author: APOORVA MANDAVILLI
C.D.C. Dismisses Airborne Transmission of Monkeypox. Some Experts Disagree.
The virus “is not known to linger in the air,” agency officials said. But the research is far from definitive.
Monkeypox Can Be Airborne, Too
An abrupt change in C.D.C. guidance underscores a little-known phenomenon: On occasion, monkeypox can be transmitted through aerosols, similar to the coronavirus.
21 Americans Infected With Monkeypox, C.D.C. Reports
As the number of cases outside Africa approaches 800, governments are scrambling for a limited pool of vaccines and treatments with unclear effectiveness.
Who Is Protected Against Monkeypox?
Older people who received smallpox vaccinations may yet have some immunity, researchers say. Healthy children and adults generally do not become severely ill.
As Monkeypox Cases Rise, Nations Are Urged to Examine Vaccine Stores
The United States has stockpiled millions of doses of two smallpox vaccines, also effective against monkeypox. But the outbreaks so far are clustered in other countries.
How Often Can You Be Infected With the Coronavirus?
The spread of the Omicron variant has given scientists an unsettling answer: repeatedly, sometimes within months.
How Often Can You Be Infected With the Coronavirus?
The spread of the Omicron variant has given scientists an unsettling answer: repeatedly, sometimes within months.
Public Health Catastrophe Looms in Ukraine, Experts Warn
Even before the war, the country struggled with epidemics of H.I.V., tuberculosis and hepatitis. The conflict threatens to undo decades of progress.
Mounting Data Shows J&J Vaccine as Effective as Pfizer and Moderna
Once dismissed as less effective, the vaccine now seems to be preventing infections and illness about as well as the two mRNA options.