The science of mask use and potential benefits has not shifted. That's the issue. Masks work. We had people wearing masks telling us they didn't work. We had the santa clara health official LICK HER FINGERS to turn her page on live TV while telling us masks don't work to help reduce hand to mouth contact.

Do folks in public health / epidimiology not understand how this total BS messaging (masks don't work) - really undermines their messaging.

Online on facebook was even worse, lots of epidemiologists with clearly no view of actual "mechanisms" this virus might move by making up just ridiculous negatives to mask wearing.

Masks and face covering are CHEAP compared to other interventions such as lockdown.

And no, there really aren't good studies showing masks increase transmission.