Health Check: when are we most likely to catch viral diseases?

Children in particular experience a multitude of viral illnesses during their early years. MIKI Yoshihito/Flickr, CC BY-SAViruses have been described as “organisms at the edge of life”, unable to reproduce outside the cells of those they infect. But this status has not impeded their evolutionary success. Children, in particular, experience a multitude of viral illnesses during their early years, which gradually reduce over time as their natural immunity develops.
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