It’s both a novel virus and a novel vaccine. Without clinical trials we really don’t know if the boosters are helping or hurting.
Also, we should be doing clinical trials on flu shots as well. New drugs, even if they are only slightly different still require clinical trials. Why is hacking the immune system not subject to the same scrutiny?
Also, we should be doing clinical trials on flu shots as well. New drugs, even if they are only slightly different still require clinical trials. Why is hacking the immune system not subject to the same scrutiny?