@earthlingusa Thanks.
People like simple stories but life isn’t simple. Covid was thought by science to not be contagious before a positive test. This was probably correct.
Unsurprisingly however evolution, a logic process hasn’t stopped, and a strain that IS contagious before positive signs has spread faster and is now dominant. Science was best efforts correct and still is best efforts correct but things have literally evolved.
The only plus side going for us is that we do have an immune response so one strain has an inoculation effect against similar strains. What this means is that evolution pressures for virulence over severity. So a faster spreading less damaging version takes over the opposite. This is how we move to endemic.
However, you are not a statistical average and you CAN do things that help. Listening to @mekkaokereke is one of those things.