Fort Detrick and likely its Russian, Chinese, and possibly Indian equivalents have had stocks of bio agents that could give a humanity a very bad day for decade

Fort Detrick and likely its Russian, Chinese, and possibly Indian equivalents have had stocks of bio agents that could give a humanity a very bad day for decades. I'm far more worried about those existing stocks than I am about a tech nerd trying to DIY the genocidal plague. Which is to say it's already a threat, it's unproven but not entirely impossible COVID leaked from a lab as just one example, but Ebola suggests that it requires more than a rogue nerd to spread a deadly virus global because once people start dying in the streets, the rest hide because they don't want to die. COVID spread because it wasn't deadly to 99% of humanity and now most of the 1% vulnerable to it are either dead or permanently crippled by long COVID so it's ambient now. I worry about attacks to the infrastructure, but I just don't buy that as a direct route to civilizational collapse.