hey Covid-Competent, well-informed folks! I have a favour to ask!
has anyone bookmarked a good reference for what % of SARS-CoV-2 cases are due to fomite transmission?
the US CDC was at one point saying:
each contact with a contaminated surface has less than a 1 in 10,000 chance of causing an infection [1]
but that's not a % of infections, it's per contact with contaminated surface. That's supported a few ways, eg. by a sampling that included counting touchpoints:
The estimated risk of infection from touching a contaminated surface was low (less than 5 in 10,000) by quantitative microbial risk assessment [2]
but that study didn't actually culture virus, they checked RNA levels and counted touches.
Try as I might, I can't actually find a grounded estimate of how many actual infections have been fomite-driven at any point in the SARS-CoV-2 pandemic.
[1] https://archive.cdc.gov/www_cdc_gov/coronavirus/2019-ncov/more/science-and-research/surface-transmission.html
[2] https://pmc.ncbi.nlm.nih.gov/articles/PMC7927285/
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