A recent common cold may nearly halve risk of COVID-19, study suggests
So Covid-Competent folks - this is going to land different in different quarters.
- The previously evidence-supported paradigm/metaphor "the immune system is a candle not a muscle" might need to be abandoned for a third, more nuanced position[+]
- Of course there's the need to check the paper itself, and if it's solid, to replicate / validate, but beyond that.
- Folks with immune dysregulation can't all just catch rhinoviruses all the time to keep the system active.
[+] probably approximately: "microbes vary:
- some are overwhelmingly beneficial, eg. in our gut;
- some have mixed costs and benefits like rhinovirus or conditions when they become pathological like candida, and
- some basically only have costs like influenza(?), SARS1 and SARS2, measles"
re: https://www.cidrap.umn.edu/covid-19/recent-common-cold-may-nearly-halve-risk-covid-19-study-suggests
