BBCNEWS Ros Atkins on... What 2021... December 19, 2021 22:51:00
And, in many richer countries, including the us, thats exactly what happened. we are announcing our plan to stay ahead of this virus l by being prepared to offer covid—19 booster shots. . now at this stage, boosters were a response to waning immunity. but right now, theyre needed for another reason, too — the omicron variant. we know that two doses of vaccine are not enough to stop you getting infected with omicron. but a booster will cut your risk of symptomatic infection by around 70%. tha...
Source: archive.org