Recently, there’s been claims that Russia has been fuelling anti-vaxxer sentiment in the US, and that one of the objectives is to undermine the health of the country - not the political health of the country, but the physical health of its people.
To be honest, while I don't doubt that Russia has been trolling the US with this content, I’m not completely convinced that undermining public health was a deliberate objective - if Russia was wanting to go down this route, I would have expected them to make sure that Russia itself was safe from vaccine-preventable diseases, but the country has the same problem many western democracies have.
However, it’s made me wonder if any attempts at similar propaganda is being done or has been done in the past. To count, they should involve either medical treatment being accepted or refused, or other bad lifestyle decisions, and they have to be done for purely malicious reasons. The USA encouraging Russians to drink excessive vodka, which financially benefits only Russian vodka producers, would count, but the US government encouraging a country to accept unsafe agricultural produce from the US to benefit US farmers financially wouldn’t count.