The WHO said its expert group had assessed the limited data from seven studies for second booster doses of messenger RNA vaccines, saying there wasn't enough information proving their effectiveness in younger, healthy people.
from US News Headlines, Latest USA News, US news live on Times of India https://ift.tt/g8CbKlw
from US News Headlines, Latest USA News, US news live on Times of India https://ift.tt/g8CbKlw
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