[jakeinspace]

I don’t know whether or not this is true, but I’d imagine that’s the only quick way to get a rough estimate, before unbiased population-level statistics can be gathered.

[alea_iacta_est]

It's both time and cost really, in vivo studies cost a lot of money.

[netizen-936824]

Plus it's not super ethical to purposely infect people with a possibly deadly pathogen, although it is done with rhinoviruses on some occasions afaik