Vaccines
This letter to the editor reports on the effectiveness of mRNA vaccines against various things for various variants:
| against | variant | # doses | VE |
| hospitalization | alpha | 2 | 85% |
| hospitalization | delta | 2 | 85% |
| hospitalization | delta | 3 | 94% |
| hospitalization | omicron | 2 | 65% |
| hospitalization | omicron | 3 | 86% |
| ventilation | alpha | 2 or 3 | 76% |
| ventilation | delta | 2 or 3 | 44% |
| ventilation | omicron | 2 or 3 | 46% |
This paper from Qatar during the early Omicron wave says that, for mRNA vaccines, a booster cuts your risk in half.
Variants
This letter to the editor says that etesevimab and bamlanivimab don’t work for shit against BA.2, but imdevimab, and casirivimab work against BA.2 despite not working against BA.1. (Casirivimab doesn’t work that well, but it does work.) Evusheld also works against BA.2.
This preprint says that Omicron was 1.5x as contagious as Delta within households and 2x as contagious outside households.