14a. Important for those worried about b1.351. While this prelim analysis of asymptomatic infection after j&j is based on 29% completed serology data, most of the serologies from South Africa had been done.pic.twitter.com/PeFLn5jhbT
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21. Systematic surveillance in nursing homes - greater than 2 log decrease in viral loads in infected residents shortly after first Pfizer dose. Likely to be associated with large drops in transmission potentialhttps://twitter.com/ClancyNeil/status/1375421980829175809 …
22. Systematic screening during nursing home outbreaks - Pfizer vaccine 63% (95% CI 33–79%) effective at decreasing infections (symptoms or no). Early during vaccination period so likely an underestimate.https://www.cdc.gov/mmwr/volumes/70/wr/mm7011e3.htm …
25. Really nice household transmission study (first of its kind that I've seen). ~50% decreased transmission potential among people infected 21d after first dose AZ or Pfizer. This is on top of very high reductions in infection risk. https://khub.net/documents/135939561/390853656/Impact+of+vaccination+on+household+transmission+of+SARS-COV-2+in+England.pdf/35bf4bb1-6ade-d3eb-a39e-9c9b25a8122a?t=1619601878136 …pic.twitter.com/sO1RQo2uJj
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