Smallpox for example and Polio (almost)
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To eradicate a virus, there are a lot of factors that need to be taken into account especially if we want to do it globally.
-The intention and capital and socio-political climate as someone mentioned.
– there should be consensus among different countries and govts for it to be considered
– all diseases are based on three factors:- the agent(microorganism), the host (humans) and the environment, the more we know about these three, the more “amenable” to eradication the disease becomes.
So for eg if the random source of the infection is the most important factor in spread and strength of the infection, then that’s easier to target and eradicate.
If we know only a single vector(like mosquito) can carry that disease, it’s easy to target- kill mosquitoes (seriously fuck mosquitoes)
If there’s no particular source and the problem lies in disease transmission from person to person, then the focus would be to decrease transmission, which is much harder as a target.
Plus if the organism, especially the virus is more prone to mutation, etc, it becomes much harder to make vaccines that will last a long time
You need money, time, scientific know-how, knowledge about the whole process, need govt support, international support, so it’s quite hard to do.
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