Vaccination with three doses is protective against infection by Omicron, but less protective than vaccines were against Delta. As a rule of thumb I am currently acting as if a booster shot is something like 60%-70% protective against infection but I don’t have confidence in that number. The main protection is still against severe disease, hospitalization and death.
Two questions about this:
Do you mean that a booster is 60-70% effective relative to being “fully” vaccinated but not boosted, or do you mean that being boosted is 60-70% effective relative to being unvaccinated?
How did you reach this conclusion? Based on the Pfizer press release, I had been treating being boosted as 95% effective (relative to being unvaccinated) since the level of neutralizing antibodies against Omicron with 3 doses was the same as the level against original Covid with 2 doses, and 2 doses were 95% effective against original.
Two questions about this:
Do you mean that a booster is 60-70% effective relative to being “fully” vaccinated but not boosted, or do you mean that being boosted is 60-70% effective relative to being unvaccinated?
How did you reach this conclusion? Based on the Pfizer press release, I had been treating being boosted as 95% effective (relative to being unvaccinated) since the level of neutralizing antibodies against Omicron with 3 doses was the same as the level against original Covid with 2 doses, and 2 doses were 95% effective against original.