Low risk of SARS-CoV-2 transmission by fomites in real-life
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A previous study done in a hospital environment showed that most surfaces were contaminated, including air-conditioning vents, bed rails, bedside lockers, and rarely, toilets. Of note, environmental surface contamination declined after week 1 of illness, and intriguingly, no surface contamination was detected in ICU rooms.

Researchers carried out two sequential studies seeking to determine on one hand the extent, if any, of contamination of inanimate surfaces in a standard infectious disease ward of a major referral hospital in northern Italy, and on the other hand whether the risk of contamination was higher in emergency rooms and sub-intensive care wards than on ordinary wards. Cleaning procedures were standard.

A number of objects and surfaces were swabbed. Remarkably, only the continuous positive airway pressure helmet of one patient was positive for SARS-CoV-2 RNA. More importantly, attempts to culture the positive swabs on Vero E6 cells were unsuccessful, suggesting that patient fomites and surfaces are not contaminated with viable virus.

These findings suggest that environmental contamination leading to SARS-CoV-2 transmission is unlikely to occur in real-life conditions, provided that standard cleaning procedures and precautions are enforced. These data would support that the chance of transmission through inanimate surfaces is less frequent than hitherto recognized.

Source: https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(20)30678-2/fulltext
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Dr. L●●l S●●●●●a General Medicine
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