Pfizer says third Covid vaccine shot for kids under 5 is 80% effective against omicron
CNBC – For more and to sign up click here A healthcare worker administers a Pfizer-BioNTech Covid-19 vaccine to a child at vaccination site in San Francisco, California, U.S., on Monday, Jan. 10, 2022. David Paul Morris | Bloomberg | Getty Images Pfizer and BioNTech‘s three-dose Covid vaccine for children......