2/ The study population included Qatar *residents*.
Note that 90% of people in Qatar are economic migrants from South Asia and other countries.
🤔
3/ Vaccine effectiveness vs INFECTION:
- Peaks at 78% ~1 month after 2nd dose of Pfizer vaccine
- Declines over time
4/ Vaccine effectiveness vs HOSPITALIZATION & DEATH:
- Remains high out to 6 months
- Appears to drop at 7+ months after 2nd dose of Pfizer vaccine
5/ Note that the median age of the study participants was 31 years. So this wasn't an especially old group.
6/ The dominant SARS-CoV-2 variant in Qatar during the study period was mostly Beta, but Delta became dominant later in the study period.
7/ Vaccine effectiveness vs SYMPTOMATIC infection was HIGHER than vs ASYMPTOMATIC infection.
8/ Vaccine effectiveness numbers in Qatar may appear lower than elsewhere because they test ~5% of the population every week.
9/ As in the U.S. & Israel, 2nd doses of Pfizer were given 3 weeks after 1st dose.
This is in contrast to the UK, EU countries, and Canada, where doses were spaced farther apart.
10/ In summary:
- Vaccine effectiveness vs INFECTION drops over time
- Vaccine effectiveness vs HOSPITALIZATION & DEATH remains stable out to 6 months
- There *may* be a drop at 7+ months, but the confidence intervals are SUPER WIDE. We need more data.
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1/ Moderna COVID vaccine minted 3 new billionaires: washingtonpost.com/business/2021/…
Yet the Moderna, which co-invented the COVID vaccine with NIH researchers at the cost of over $8B to taxpayers, refuses to step up to increase vaccine supply for low- & middle-income countries globally.
2/ Moderna doesn't want to sell its vaccine to low- & middle-income countries at cost.
Never mind it's making massive profits off the US & other high-income countries.
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