Here is a study from 2009 that shows it happens to athletes that have flu / influenza / "common cold" https://jcmr-online.biomedcentral.com/articles/10.1186/15

Here is a study from 2009 that shows it happens to athletes that have flu / influenza / "common cold" https://jcmr-online.biomedcentral.com/articles/10.1186/1532-429X-11-S1-O3 https://jcmr-online.biomedcentral.com/articles/10.1186/1532-...