You're ignorant of the research and drink the media kool-aid. The CDCs own webste cited 13 studies showing masks use show "limited evidence for their effectiveness."
You can easily find dozens of studies showing their limited or zero effectiveness on viruses. Unfortunately, libtards are lazy researchers. You do, however, make good sheep. That's why Democrats love you. You're easy to manipulate.
Skurce: https://wwwnc.cdc.gov/eid/article/26/5/19-0994_article