A health worker administers a Pfizer Covid-19 vaccine in Los Angeles, California, on 29 January 2022.Photograph: Shannon Stapleton/Reuters There is a lot of confusion about Covid vaccines this year.

The fall COVID-19 vaccine season is starting slowly for Pfizer, with U.S. sales of its Comirnaty shots sinking 25% after federal regulators narrowed recommendations on who should get them.

NEW YORK (Reuters) -Americans headed to pharmacies for COVID-19 vaccines are running into roadblocks and confusion due to new U.S. guidance that abandoned broad support for the shots, contributing to ...

As a group of advisers to the US Centers for Disease Control and Prevention met this week to discuss recommendations on who should get the updated Covid-19 shot this season, a newly published analysis ...