with all the calls for reintroduction of mask mandates, it seems like a good time to review mask efficacy evidence. a 🧵...
please share with mask evangelists.
the one in which masks were shown as 'statistically insignificant' in preventing covid transmission.
acpjournals.org/doi/10.7326/M2…
the one in which medical masks were shown to be very penetrable (not even counting leaks out sides) and cloth masks were actually shown to increase risk of transmission.
pubmed.ncbi.nlm.nih.gov/25903751/
the one in which masks show no benefit in reducing transmission of colds.
pubmed.ncbi.nlm.nih.gov/19216002/
the one in which N95's show no superiority over medical masks with regarding to reducing transmission.
jamanetwork.com/journals/jama/…
the one in which masks take on the flu with no conclusive evidence of transmission reduction.
onlinelibrary.wiley.com/doi/epdf/10.11…
the one in which there is no evidence they work, but they SHOULD work.
cambridge.org/core/journals/…
the one in which the CDC show masks do not reduce flu transmission.
wwwnc.cdc.gov/eid/article/26…
and then the WHO admitting there is no evidence masks reduce viral transmission but we should wear them in pandemics anyway.
apps.who.int/iris/bitstream…
*regard* to 🙄
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