3 ms·
It’s an estimate based on the probability of a virus finding new hosts. the higher the proportion of potential hosts that are immune, the less likely the virus
by mr_toad 6y ago
It’s an estimate based on the probability of a virus finding new hosts. the higher the proportion of potential hosts that are immune, the less likely the virus is to spread.
- tonyedgecombe 6y agoHerd immunity is the threshold where the replication rate falls below 1. It's not the point at which transmission stops. The disease will continue beyond that point.
- hatenberg 6y agoThats, uhm, very limited understanding. Currently behavioral changes (mask, etc) are much larger factors affecting R0 and none of them have any bearing on hwrd immunity. Plus we are finding that traditional herd immunity (aka just let the disease rampage) may come at the cost of heart disease in a majority of cases.
- tonyedgecombe 6y agoOf course they have an effect on herd immunity. If behaviour changes then the replication rate changes and hence the herd immunity threshold changes.
- ekianjo 6y agoIs it based on any kind of evidence? Just wondering if we have ever measured this kind of number in any way.