All the papers I've read about survival of viruses outside of the host refer to longer survival times on hard surfaces without explaination. As a layman I would have thought that a virus (who's main environmental dangers are things like UV would survive better on rough or porous surfaces, where they are protected and can hide from the light and weather, not the other way round.
For example, one paper I read recently (although it's an old paper) showed Ebola virus surviving for 50 days on glass but not even 2 on rough materials. Can anyone enlighten me as to what it is about glass that makes such an ideal home for viruses to extend it's lifespan by over 25 times?
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