No, not everything has a reason. All forms of DNA and RNA are subject to mutation; accordingly, viruses take on new forms all the time. (I'm sure someone on this list can more precisely describe / plot the rate at which viral mutations emerge as lethal pathogens.) If one more yahoo says something about Covid-19 being God's message, or lesson, or harbinger of the Second Coming, I'm going to stroke out, and Covid-19 will never have chance to get me!
t/2 x v/m -(10.-*)=LP. Divided by the square root of the population of the earth. Sure, that's it.
The transmission rate of the pathogen to susceptible hosts per infected host is β
@Green_Chile_Type And the value = S otherwise known as BS.
@Green_Chile_Type How the hell did I get a glass of beer?
@Green_Chile_Type (a) (A)
@Green_Chile_Type Oh, hidden icons.