Well I hold the view that the number of sites where smallpox is stored should be kept low (I have heard that one Russain and one US site have it) but the last remaining samples should not be destroyed in case smallpox or a similar virus becomes a public health problem in the future.
I think without the samllpox samples the battle against the virus would be harder.
I think that crabs is a smaller public health problem, I think that we can allow these organisms to become extinct. But I think it would be close to impossible to coordinate a shaving/insecticide program to exterminate them.
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Health is a state of physical, mental and social wellbeing and not merely the absence of disease or infirmity

I am not a jigsaw, I am a free man !
Diagnosed under the DSM5 rules with autism spectrum disorder, under DSM4 psychologist said would have been AS (299.80) but I suspect that I am somewhere between 299.80 and 299.00 (Autism) under DSM4.