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User Info	Covid-19 -- A White Paper - To @RealDonaldTrump and @CDC; entered at 2020-12-03 08:27:38
Mangobanana Posts: 5 Registered: 2020-11-11 Bedford, UK	Please, somebody help me with my maths here: The Pfizer vaccine trial included nearly 44,000 people. Half getting their vaccine, half getting a placebo. In total, from the 44,000 people, 170 were later recorded as having become infected with Covid19. 162 of them were in the placebo group, 8 of them in the vaccine group. The vaccine is therefore credited with preventing 162 cases of Covid19or 95%. Suppose they used a vaccine that did nothing. You would expect that 50% would be in the vaccine group and 50% in the placebo group. Would they then claim their vaccine was 50% effective? 2020-12-03 08:27:38