Remember - it's the 0.1% that kills you. 😕
And that bacteria can reproduce (double) every 20 minutes or so. So in an hour that .1% is .8%, 2 hours is 6.4%, 3 hours is 25.6%, 3 hours 40 minutes is back to 100%.
first the virus is not bacteria.
but for bacteria, the doubling is in best conditions. after a good dose of bleach the bacteria won't be reproducing like that, but there's always that black sheep that survives and stays alive for a bit longer.
in terms of viruses the only way they reproduce is by using host cell as a reproduction factory.
in terms of infectious things this is the formula
severity of disease = pathogen virulence X dose divided by (/) immunity
in terms of covid19
virulence very high
immunity healthy people are higher, not healthy pretty low and there's always someone whose B and T cells have the coincidental right combination that makes them immune to something, even HIV, even having never met the thing.
dose - that's what the protective measures are trying to make as low as possible