FDA backs changing Covid booster shots to target most recent omicron subvariants - Earth News Report
There hasn't been enough research on how much protection a fourth dose can offer, medical professionals told CNBC.Justin Sullivan | Getty ImagesThe Food and Drug Administration on Thursday said vaccine manufacturers should update their Covid-19 booster shots to target the most recent omicron subvariants that are gaining ground in the U.S.Dr. Peter Marks, head of
