Dr John Campbell
@campbellteaching·3.3M subscribers·3.1K videos
Coronavirus survival
Posted
October 13, 2020
Views
117,248
Likes
4,454
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1,394
Engagement
4.99%
October 13, 2020
117,248
4,454
1,394
4.99%
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16:04Now PlayingSurvival of SARS-CoV-2 in different environmental conditions
Stability of SARS-CoV-2 in different environmental conditions (Lancet April)
)300033/fulltext
SARS-CoV-2 more stable on smooth surfaces
No infectious virus could be detected from smooth surfaces on day 4 (glass and banknote)
Overall, SARS-CoV-2 can be highly stable in a favourable environment
Susceptible to standard disinfection methods.
The effect of temperature on persistence of SARS-CoV-2 on common surfaces (Virology Journal, 7th October)
Australian Centre for Disease Preparedness, Geelong, VIC, Australia
The rate at which COVID-19 has spread throughout the globe has been alarming
Role of fomite transmission is not yet fully understood
The risks of fomite transmission from contaminated surfaces.
This study measured the survival rates of infectious SARS-
CoV-2, on several common surface types
In the dark, (negate any effects of UV light)
20’C
Half-lives 1.7 to 2.7 days
Viral loads equivalent to the highest titres excreted by infectious patients
Viable virus was isolated for up to 28 days at 20 °C from common surfaces
Glass
Stainless steel
Paper and polymer banknotes
40’C
Virus survived less than 24 h at 40 °C on some surfaces
SARS-CoV-2 can remain infectious for significantly longer time periods than generally considered possible
These results could be used to inform improved risk mitigation procedures to prevent the fomite spread of COVID-19.
Exaggerated risk of transmission of COVID-19 by fomites (Lancet 3rd July)
)305612.pdf
In my opinion, the chance of transmission through inanimate surfaces is very small
Where an infected person coughs or sneezes on the surface
and someone else touches that surface soon after the cough or sneeze (within 1–2 h)
I do not disagree with erring on the side of caution
Although periodically disinfecting surfaces and use of gloves are reasonable precautions especially in hospitals
CDC, How COVID-19 Spreads
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