People get the flu multiple times due to mutant escape from the vaccines. So the same thing is likely with Covid. Over time the flu vaccines have become less effective, again escaping the vaccines.
People get the flu multiple times due to mutant escape from the vaccines. So the same thing is likely with Covid. Over time the flu vaccines have become less effective, again escaping the vaccines.
People get the flu multiple times due to mutant escape from the vaccines. So the same thing is likely with Covid. Over time the flu vaccines have become less effective, again escaping the vaccines.