Wearing a mask (including cloth ones) is a useful measure to limit viral spread, although official communication on this subject may have lacked clarity.

noli's read

Scientific literature confirms that wearing a mask reduces the transmission of droplets and aerosols, acting as an effective physical barrier, especially when worn by an infected person (source: Cochrane meta-analyses and observational studies published in The Lancet). It is accurate that early official recommendations evolved, moving from excessive caution to widespread adoption as evidence on asymptomatic transmission accumulated. The claim that certain arguments surrounding masks may be 'sketchy' reflects the necessary nuance: while collective efficacy is supported by strong evidence, cloth masks vary enormously in terms of filtration quality depending on the material and fit, which makes their performance less predictable than that of certified masks (medical or N95). There is no evidence that the mask is ineffective, but it is scientifically accurate to say that its performance depends on crucial technical and behavioral factors. The approach of examining the evidence rather than blindly following shifting guidelines is a rigorous practice in public health.

the sources

No named source held this one up — that absence is part of the verdict.