Carl Zimmer

Some experts call for delaying second shots to speed vaccinations.

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Europe’s drug regulator investigates some blood clots after Johnson & Johnson shots, but no link is clear.

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Matter

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.

More Contagious Virus Variant Is Now Dominant in U.S., C.D.C. Chief Says

The B.1.1.7 variant, first identified in Britain, is now the source of most new coronavirus infections in the United States, the director of the Centers for Disease Control and Prevention said.

Una vacuna de bajo costo contra la COVID-19 está en marcha

Una nueva formulación que está entrando en ensayos clínicos en Brasil, México, Tailandia y Vietnam podría cambiar la forma en que el mundo combate la pandemia.

A low-cost vaccine entering clinical trials could change how we fight the pandemic.

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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.

?Qué pasaría si combinamos dos dosis de vacunas distintas?

Los investigadores estudian los posibles beneficios de combinar dosis de dos vacunas diferentes para la COVID-19.

Factory Mix-Up Ruins Up to 15 Million Vaccine Doses From Johnson & Johnson

A manufacturing subcontractor in Baltimore mixed ingredients from the coronavirus vaccines of Johnson & Johnson and AstraZeneca, delaying U.S. shipments of the “one-and-done” shot.

Scientists wonder if a mix-and-match approach to vaccines could be the way to go.

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