In a public environment hands would be a transmission pathway just as much as airborne.
“The source of bacterial contamination in SMs was the body surface of the surgeons rather than the OR environment.”
“Surgical masks as source of bacterial contamination during operative procedures”
https://pubmed.ncbi.nlm.nih.gov/30035033/
The report concluded that the remedy to the contamination problem with masks during surgery was to:
“Moreover, we recommend that surgeons should change the mask after each operation, especially those beyond 2 hours. Double-layered SMs or those with excellent filtration function may also be a better alternative.”
Problem solved!