BBCNEWS BBC News December 14, 2021 14:03:00
Vaccines. vaccines have proven to be highly effective against previous variance for example the alpha and delta variance. this has weakened the link between cases and hospitalisations and deaths and has allowed us to reopen our country. but recent analysis from the uk hsa has shown that two doses of our vaccine provide much lower levels of protection against symptomatic infections from omicron when compared to the delta variant. but more encouragingly the effectiveness rose considerably in the early period after a booster dose providing around 70 to 75% protection against symptomatic infection...
Source: archive.org