@rt.com 3 years ago CDC expands Covid-19 booster advice amid Omicron scare
@WSJ 4 years ago The Biden administration is expected to call for a third Covid-19 shot for Americans who were fully vaccinated with the two-shot regimen, citing the threat from the Delta variant and concerns over data showing initial immunity wanes over time on.wsj.com
@aljazeera.com 4 years ago Pfizer data suggests COVID-19 shot protects against SA variant