3 ms·
Given that many people didn't bother washing their hands after using the toilet, didn't wash their fruits and vegetables and considering how e.g. restaurant tab
by blub 6y ago
Given that many people didn't bother washing their hands after using the toilet, didn't wash their fruits and vegetables and considering how e.g. restaurant tables are "cleaned", such overzealous cleaning was long overdue. Once the Coronavirus danger's over we'll be back to being our filthy old selves, if such articles don't already accelerate the transition :-)
That being said, I looked at the resources [#] which the CDC brief is using to make its 1 in 10000 claim and the evidence is pretty thin. One source which claimed a similar number (less than 5 in 10000) swabbed "high-touch surfaces" between March and June 2020 in Massachusets and then correlated that to community infections.
Another source was looking at how to reduce risk to 1 in 1.000.000 by using biocidals.
Finally, the Pitol and Julian study uses a model to estimate the risk. This is probably the source of the stat - "The overwhelming majority of interactions with fomites modeled (sic) were associated with risks less than 10^–4". Here are some details:
* the probability of infection was estimated based on a model built on SARS and MHV-1 infections in mice.
* the SARS-CoV-2 concentration on surfaces was taken from a study in Brazil and the already mentioned Massachusets study.
* "Contamination of SARS-CoV-2 on surfaces in public spaces (e.g., traffic light buttons, train buttons) was modeled as a function of disease prevalence in the community and frequency of contact with the surface"
I really wish that the people writing these articles would make an effort, look at the studies and highlight the main assertions and conditions of the experiments instead of being so smug. Based on what I've ready myself, the 1 on 10.000 number is dubious.
[#] https://www.acc.org/latest-in-cardiology/ten-points-to-remember/2020/09/28/16/27/transmission-of-sars-cov2 https://www.acc.org/latest-in-cardiology/ten-points-to-remem...
[#] https://www.journalofhospitalinfection.com/article/S0195-6701(20)30437-0/fulltext#bib110 https://www.journalofhospitalinfection.com/article/S0195-670...
[#] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7605577/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7605577/
[#] https://www.ajicjournal.org/article/S0196-6553(20)30997-4/fulltext https://www.ajicjournal.org/article/S0196-6553(20)30997-4/fu...
[#] https://pubs.acs.org/doi/10.1021/acs.estlett.0c00966 https://pubs.acs.org/doi/10.1021/acs.estlett.0c00966*