Herd Immunity explained for Dummies
Well I don't know about you , but herd immunity is a bit like, we all know what it is , 'cos we've been told - So it's easy like ????? its about 90% innit ? So far, so good. A standard definition is the amount that would stop an infection getting out of control, in that for every person infected, they, in turn , would infect [ on average] no more than one other person . For this reason epidemiologists often quote the reinfection rate for clarity. Coronavirus is 2.4 , ie for every person getting it, on average 2.4 people get it from that person [ assuming no other situations affect this] . Let's take a reinfection of 1.00 for simplicity,ie for every person catching it, they reinfect another person. So for a family of 4 , one person gets it- 1-2 family members catch it ..... Wrong.... this is about statistics [ long word, so just call it odds if you know a little about betting] . If one family member gets it, it becomes likely that the entire family may well su...