This preprint from Israel says that in the second and third weeks after a third dose of Pfizer, there was a 48-68% drop and a 70-84% drop.
This preprint says:
- Antibody levels are similar in unvaxxed people who get symptomatic and asymptomatic infections.
- Antibody levels decrease over time. Antibody levels were higher in people who had gotten COVID-19 disease and then a vaccination.
- They didn’t find a big difference between AZ, Pfizer, and Moderna.
This study took about 8000 people with allergy histories, and then pulled 500 who were likely to be really allergic to the Pfizer vax, and vaxxed them. 98% had no allergic reaction, 1% had a mild allergic reaction and 0.7% had an anaphylactic reaction.
Testing / Long COVID
This report says that a lot of people who have had COVID-19 do not develop detectible antibodies, especially young people or ones with lower viral load. This tweet does some explaining. Note that doctors look for antibodies to see if someone has Long COVID. This paper says that women are four times as likely as men to lose antibodies.
This article talks about the team at Pfizer which is working on scariants: seeing if they evade immune responses, making vax targeting new strains, etc.
This article talks about why projections are difficult.
This article questions why AIDS, malaria, and TB are not considered pandemics.