Loading ...But looking at your link, there were more infections (although so few as to be statistically insignificant) in the more rigorous cohort, where they replaced masks after each operation rather than wearing them all day.
“Four hundred and eighty-eight cases were reviewed: 240 in the pre-COVID-19 cohort and 248 in the extended surgical mask use cohort. Three SSIs were identified in the 2019 cohort, and two in the 2020 cohort.”
Again, a piddly little sample compared to Orr’s of a thousand in each cohort. Although ironically if it shows anything it supports his numbers – the cleaner the masks, the more the infection.
“All the cases performed from August 2019 through October 2019 were performed under extant hospital policy which required replacement of surgical masks after every case for all operating room personnel, including the operating surgeons and trainees. In contrast, all the cases performed from August 2020 through October 2020 used the modified hospital and operating room policy restricting surgical mask use to one mask for each operative personnel, per day, unless soiled.”