Endemic viruses are those that have constant presence within a geographical area. Such viruses are all around us, though they vary by location. Examples in Europe and North America include the rhinovirus and influenza virus, while the dengue and chikungunya viruses are endemic in many Asian countries.
that, for most people, just cause a cold. Whether SARS-CoV-2, the virus that causes COVID-19, will join them will be down to two predominant factors that control how a virus behaves in a population: the virus’s biology and the immunity of the host population.Despite knowing a lot about the biology of endemic viruses around today, it’s very difficult to work out where they actually came from.
, unable to infect or replicate. But a small number of these mutations might result in an advantageous change. For example, they may allow the virus to get into host cells quicker or make the jump to a new, different host.
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