The problem is one of public confidence. 50% effectiveness would be very useful epidemiologically, but you'd still get a lot of pissed off infected people who t

The problem is one of public confidence. 50% effectiveness would be very useful epidemiologically, but you'd still get a lot of pissed off infected people who thought they were safe. Conveying the message that we're going to stick a needle in your arm and it might not do you any good to a public that's already rife with scepticism about vaccines is a PR problem I'm very glad isn't mine to deal with.