Yes, it is. Right now, I'm looking for other critiques of it that get into more detail than PP, which is how I landed on this page.

Also, a note on the author's assertion that "facemasks were recommended by the World Health Organization (WHO) in June 2020": This is only partially true. It recommended medical masks only for certain categories of at-risk people, or if you were symptomatic. It recommended the use of non-medical masks only in public areas of high transmission. But it did not recommend widespread non-medical fabric mask use by the general public. See here: www.afro.who.int/.../...ic-when-and-how-use-masks.