First data on booster vaccine effectiveness vs Omicron (581 cases): drop in protection vs symptomatic infection by 2 doses (AZ ->0, Pfizer-> <40%) restored to ~75% with 3rd shot Pfizer
assets.publishing.service.gov.uk/government/upl… @UKHSA
khub.net/documents/1359…
assets.publishing.service.gov.uk/government/upl… @UKHSA
https://twitter.com/freja_kirsebom/status/1469350543172771852
khub.net/documents/1359…
The 95% CI presented here with relatively small number of Omicron cases overlap vs Delta, but certainly suggest less protection after 3rd dose.
For Omicron, essentially no protective effect of 2 AZ doses, 3rd goes to 71% (42,86); 2 Pfizer doses to 34%, 3rd doses to 76% (56,83)
For Omicron, essentially no protective effect of 2 AZ doses, 3rd goes to 71% (42,86); 2 Pfizer doses to 34%, 3rd doses to 76% (56,83)
Much more new beyond 1st look at Omicron vaccine effectiveness, summarized in a terrific thread by @kallmemeg
— ~7% cases Omicron reinfections (0.4% Delta)
— 3.2X adjusted odds of household transmission (vs Delta)
— big growth advantage👇
https://twitter.com/kallmemeg/status/1469350830864322560
— ~7% cases Omicron reinfections (0.4% Delta)
— 3.2X adjusted odds of household transmission (vs Delta)
— big growth advantage👇
Best part of the data on these 581 UK cases:
no hospitalizations or deaths to date
no hospitalizations or deaths to date
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