Citing the Delta Variant, Pfizer Will Pursue Booster Shots and a New Vaccine
The New York Times
Scientists were critical of the announcement, pointing to evidence that the current two-dose regimen is powerfully effective against the coronavirus.
Pfizer and BioNTech announced on Thursday that they were developing a version of the coronavirus vaccine that targets Delta, a highly contagious variant that has spread to nearly 100 countries. The companies expect to begin clinical trials of the vaccine in August. Pfizer and BioNTech also reported promising results from studies of people who received a third dose of the original vaccine. A booster given six months after the second dose of the vaccine increases the potency of antibodies against the original virus and the Beta variant by five- to tenfold, the companies said. Vaccine efficacy may decline six months after immunization, the companies said in a news release, and booster doses may be needed to fend off virus variants.
As the glaciers of South America retreat, the supply of freshwater is dwindling and its quality is getting worse.
It’s something turkey often isn’t — undeniably juicy and a guaranteed crowd-pleaser.
A rise in the disease in younger people was not followed by an increase in deaths, a study found, and might be a sign of overdiagnosis.
The Homotherium cub was preserved in Siberian permafrost with its dark fur and flesh intact.
A small study found ChatGPT outdid human physicians when assessing medical case histories, even when those doctors were using a chatbot.
For a century, exoplanet hunters have “discovered” planets around a nearby star, only to retract the claims. But the latest find is for real.
The unidentified patient had recently returned from Africa, where the virus has caused a deadly epidemic, health officials said.
The event produces some of the year’s fastest meteors, although the nearly full moon may make them challenging to spot.
Mr. Musk dug into his companies’ budgets, preferring to cut too much rather than too little and to deal with the fallout later. Under Donald Trump, he is set to apply those tactics to the U.S. government.
Behind the scenes at a Chicago zoo, chimpanzees who spent years entertaining humans are learning to befriend their own kind.
The agency’s top medical official was responding to rumors that Suni Williams had lost an unusual amount of weight during an extended stay in orbit.