Russia is the most prolific nuclear power.

It remains to be seen what will happen with lesser ones. The entire world combined has fewer than a third of either the Russian or American arsenals (by number of weapons).

https://en.wikipedia.org/wiki/List_of_states_with_nuclear_we...

This goes far beyond "nuclear proliferation." It's about medical, pathogen research. The Wuhan lab for coronavirus was also backed by the US to study such viruses.

Proliferation is also about vaccination and HIV prevention, etc. USAID et al. are among the most important programs in development and prevention worldwide. This is a tragedy chosen by a majority of Americans because what goes around comes around. COVID showed again that pandemics don't stop at borders.

Especially when they escape from laboratory doing gain of function funded with their own money.

The deeper rumours say it was spread intentionally and blamed on China.