There was a study that showed masks are ineffective against influenza. I know a link is in coronavirus, will try and link you direct when I have time.
Here is a link. https://wwwnc.cdc.gov/eid/article/26/5/19-0994_article
There was a study that showed masks are ineffective against influenza. I know a link is in coronavirus, will try and link you direct when I have time.
Here is a link. https://wwwnc.cdc.gov/eid/article/26/5/19-0994_article
(post is archived)