Often referenced "masks do harm" study retracted.

See: https://t.co/utu7br0qg6

Editors: "...complaints were valid ... the article does not meet the standards of editorial & scientific soundness..."

Will likely live on as a zombie & retraction part of a conspiracy narrative. pic.twitter.com/wyXHVJC76T

— Timothy Caulfield (@CaulfieldTim) May 19, 2023