Diseases, Conditions, Syndromes

Study: COVID booster effectiveness wanes but remains strong

An early look at the performance of COVID-19 booster shots during the recent omicron wave in the U.S. hinted at a decline in effectiveness, though the shots still offered strong protection against severe illness.

Vaccination

Study confirms effectiveness of COVID-19 booster vaccinations

A new study from the Center for Disease Control and Prevention confirms what Mayo Clinic and other experts have been saying: COVID-19 booster vaccinations improve protection against severe illness and hospitalization. The ...

Vaccination

COVID-19 vaccine booster drive is faltering in the US

The COVID-19 booster drive in the U.S. is losing steam, worrying health experts who have pleaded with Americans to get an extra shot to shore up their protection against the highly contagious omicron variant.

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