The first dose of Pfizer Inc's Covid-19 vaccine is 85% effective, a study of healthcare workers at an Israeli hospital has found, potentially fuelling a debate over the recommended two-dose schedule as governments try to stretch out supplies.
from World News Headlines, Latest International News, World Breaking News - Times of India https://ift.tt/3k0akH0
from World News Headlines, Latest International News, World Breaking News - Times of India https://ift.tt/3k0akH0
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