for surprising null or even slightly negative result of surgeons masking vs. surgery patient wound infections.
Assuming linear scaling or other naive-model benefits from masks runs into large-scale gen-pop experience, which has now been studied by enough RCTs to cast doubt on the assumption. Long-term WHO and CDC policy guidance was based on empirical science showing non-pharmaceutical interventions are not very effective against respiratory viruses.
https://link.springer.com/article/10.1007/BF01658736
https://ncbi.nlm.nih.gov/pmc/articles/PMC2493952/pdf/annrcse...
for surprising null or even slightly negative result of surgeons masking vs. surgery patient wound infections.
Assuming linear scaling or other naive-model benefits from masks runs into large-scale gen-pop experience, which has now been studied by enough RCTs to cast doubt on the assumption. Long-term WHO and CDC policy guidance was based on empirical science showing non-pharmaceutical interventions are not very effective against respiratory viruses.