I once read a study during the height of covid about this[1], which is why I loaded up on Metform. Was lucky enough not to get covid in the meanwhile (or didn't notice), but better safe than sorry.[2]

[1]2022: https://www.nejm.org/doi/full/10.1056/NEJMoa2201662 [2]2024: https://www.cidrap.umn.edu/covid-19/common-diabetes-drug-low...