The surgeon general said in March that masks were not effective for the general public against Covid-19.
The CDC said on March 13, 2020 that there is really no evidence that wearing a mask will reduce your risk for any respiratory infection.
Of course they say there’s no evidence that a mask will protect YOU. Masks aren’t supposed to protect YOU. They prevent YOU transmitting the virus to OTHERS. So of course it doesn’t reduce YOUR risk of respiratory infection. That conclusion has not changed.
The guidance was pretty clear: they didn’t want people wearing masks because there was a PPE shortage. Now there isn’t a shortage, so they want people wearing masks.
It's false that the guidance was clear the reason for recommending people not wear masks was because of a shortage. US health officials stated that masks were ineffective and may increase the likelihood of infection because of touching your face while wearing a mask.
As someone pointed out Sweden to this day has this to say about mask usage:
"The scientific evidence around the effectiveness of face masks in combatting the spread of infection is weak, which is why different countries have arrived at different recommendations."
https://www.folkhalsomyndigheten.se/the-public-health-agency...