Can virus be destroyed If no how is smallpox no longer existing?

Answer 1

It was contained and eradicated probably through quarantining. It does still exist for defence purposes......A virus only exists within a host, (it needs your dna/rna to multiply), so if it has no hosts, ie all hosts are contained and then when they sadly move on, the virus dies. You cannot kill a virus as it is made of a protein shell which contains DNA or RNA to be specific. If you were to destroy these within a human/animal, you would also destroy the human/animal as your entire body is made up of protein and DNA. Look up human Biology and biotechnology sites for a better explanation.