Scientists are asking a lot of questions about Covid-19 booster shots, but they don’t yet have many answers. Here’s what they know so far.
Author: CARL ZIMMER
This New Covid Vaccine Could Bring Hope to the Unvaccinated World
The German company CureVac hopes its RNA vaccine will rival those made by Moderna and Pfizer-BioNTech. It could be ready next month.
A new study hints at a reason the J.&J. and AstraZeneca vaccines may cause blood clots in rare cases.
A panel of experts advising the Centers for Disease Control and Prevention is discussing rare blood clots that health officials have investigated in Johnson & Johnson coronavirus vaccine recipients.
To Speed Vaccination, Some Call for Delaying Second Shots
Stretching the time between the first and second doses would greatly accelerate the rate at which people get at least partial protection. But some experts fear it could also lead to new variants.
Researchers Are Hatching a Low-Cost Covid-19 Vaccine
A new formulation entering clinical trials in Brazil, Mexico, Thailand and Vietnam could change how the world fights the pandemic.
Researchers Are Hatching a Low-Cost Coronavirus Vaccine
A new formulation entering clinical trials in Brazil, Mexico, Thailand and Vietnam could change how the world fights the pandemic.
Virus Variant in Brazil Infected Many Who Had Already Recovered From Covid-19
The first detailed studies of the so-called P.1 variant show how it devastated a Brazilian city. Now scientists want to know what it will do elsewhere.
Virus Variant in Brazil Infected Many Who Had Already Recovered From Covid-19
The first detailed studies of the so-called P.1 variant show how it devastated a Brazilian city. Now scientists want to know what it will do elsewhere.
The Virus Variant Spreading in Britain May Make Vaccines Less Effective, Study Shows
The highly infectious variant has developed a worrisome mutation, new research has found.