Pfizer vaccine

Omicron variant

Data indicate omicron is milder, better at evading vaccines

The omicron variant is offering more hints about what it may have in store as it spreads around the globe: A highly transmissible virus that may cause less severe disease, and one that can be slowed — but not stopped — by today’s vaccines. An analysis Tuesday of data from South Africa, where the new

COVID-19

EXPLAINER: How much COVID-19 vaccine will be shipped in US

COVID-19 vaccines have begun shipping in the U.S. after getting emergency authorization, setting off the nation’s biggest ever vaccination push. But supplies are expected to be limited for some time. The first wave of shipments is going to health care workers and nursing home residents. Officials say vaccines should be available to everyone by the

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