@DocWoc71 @CarlosdelRio7 @cla_cor @SochinfOficial @BrendaCrabtreeR @ManucoMd @MInternapy @medpedshosp How come this plot says the vaccine is effective? Once someone is infected during a single dose, he/she will never be infected after 2nd dose- either the person will die or recover. COVID reinfection is rare. Therefore, effectiveness after the second dose will always be higher! 
@DocWoc71 @CarlosdelRio7 @cla_cor @SochinfOficial @BrendaCrabtreeR @ManucoMd @MInternapy @medpedshosp Another point here is that this is large-scale data. 10.2 million participants. This finding is a big deal. The plot clearly shows that infection is higher in one dose vax people than unvax people. If the vaccine helps spread the virus, many unvax people suffered from it.
@DocWoc71 @CarlosdelRio7 @cla_cor @SochinfOficial @BrendaCrabtreeR @ManucoMd @MInternapy @medpedshosp Calculate effectiveness this way- make sample of the same amount of vaxed and unvaxed people. Subtract no. of cases from one dose vax people from the cases of unvax people. Becasue this amount of people would catch virus anyway if they were vaccinated. now find effectiveness.
@DocWoc71 @CarlosdelRio7 @cla_cor @SochinfOficial @BrendaCrabtreeR @ManucoMd @MInternapy @medpedshosp
@DocWoc71 @CarlosdelRio7 @cla_cor @SochinfOficial @BrendaCrabtreeR @ManucoMd @MInternapy @medpedshosp If vaccine effectiveness is not calculated this way, anyone can make a vaccine or medicine which can kill every potential covid vulnerable people during one dose and can claim 100% effectiveness after the second dose.
@DocWoc71 @CarlosdelRio7 @cla_cor @SochinfOficial @BrendaCrabtreeR @ManucoMd @MInternapy @medpedshosp Correction- right hand side of the first equation: covid cases among single vax people
@DocWoc71 @CarlosdelRio7 @cla_cor @SochinfOficial @BrendaCrabtreeR @ManucoMd @MInternapy @medpedshosp
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