Dagne
Elite member
There are a number of interesting researches dealing with transmission of coronavirus.
One Chinese study Indoor transmission of SARS-CoV-2 https://www.medrxiv.org/content/10.1101/2020.04.04.20053058v1.full.pdf+html
says that
“among our 7,324 identified cases in China with sufficient descriptions, only one outdoor outbreak involving two cases occurred.”
Methods: "We collected descriptions of each confirmed case from the local Municipal HealthCommission website of 320 prefectural cities in mainland China, not including Hubei province. Each local Municipal Health Commission announced a description of the confirmed cases each day. The case descriptions generally included age, sex, venue of infection, symptoms, date of symptom onset, hospitalisation, and confirmation and history overxposure. Many described cases also included the individual trajectory and relationship with other confirmed cases, and quite often clusters had already been identified. We consulted the websites nationwide except for those of cities in Hubei province and collected all available data up to 11 February 2020. Data from a few major cities – Beijing, Shanghai, andGuangzhou – were not included in our analysis due to insufficient case descriptions. Case descriptions from Hong Kong, Macao, and Taiwan were collected from their health authorities. We input the data into a database in a unified format and conducted cross validation to ensure data reliability. A total of 7324 cases with the minimum required descriptions (i.e., the information listed above) were found; these accounted for 66.7% of the 10,980 confirmed non-Hubei cases inChina by 11 February 2020. "
The findings are very significant, it means that practically there is little change of getting infected while being outside. Surface cleaning and hand washing, too, might not be the way to stop the transmission, it is more about being together in a closed badly ventilated place.
On the other hand, the findings may reflect transmission routes under lockdown conditions, because China started lockdown outside of Hubei province from the 2nd or 3rd of February, and conditions where such that transmission could mostly happen in at home among related persons.
Having said that I think it is still true that transmission happens in-doors, if it is home or work environment. The latest cluster of infections in Lithuania is among sewing workshop workers which worked in the same closed space, and it did happen in spite of general precautionary measures. Staying within in-door space for a longer time with at least one infected person is enough to start a large cluster.
One Chinese study Indoor transmission of SARS-CoV-2 https://www.medrxiv.org/content/10.1101/2020.04.04.20053058v1.full.pdf+html
says that
“among our 7,324 identified cases in China with sufficient descriptions, only one outdoor outbreak involving two cases occurred.”
Methods: "We collected descriptions of each confirmed case from the local Municipal HealthCommission website of 320 prefectural cities in mainland China, not including Hubei province. Each local Municipal Health Commission announced a description of the confirmed cases each day. The case descriptions generally included age, sex, venue of infection, symptoms, date of symptom onset, hospitalisation, and confirmation and history overxposure. Many described cases also included the individual trajectory and relationship with other confirmed cases, and quite often clusters had already been identified. We consulted the websites nationwide except for those of cities in Hubei province and collected all available data up to 11 February 2020. Data from a few major cities – Beijing, Shanghai, andGuangzhou – were not included in our analysis due to insufficient case descriptions. Case descriptions from Hong Kong, Macao, and Taiwan were collected from their health authorities. We input the data into a database in a unified format and conducted cross validation to ensure data reliability. A total of 7324 cases with the minimum required descriptions (i.e., the information listed above) were found; these accounted for 66.7% of the 10,980 confirmed non-Hubei cases inChina by 11 February 2020. "
The findings are very significant, it means that practically there is little change of getting infected while being outside. Surface cleaning and hand washing, too, might not be the way to stop the transmission, it is more about being together in a closed badly ventilated place.
On the other hand, the findings may reflect transmission routes under lockdown conditions, because China started lockdown outside of Hubei province from the 2nd or 3rd of February, and conditions where such that transmission could mostly happen in at home among related persons.
Having said that I think it is still true that transmission happens in-doors, if it is home or work environment. The latest cluster of infections in Lithuania is among sewing workshop workers which worked in the same closed space, and it did happen in spite of general precautionary measures. Staying within in-door space for a longer time with at least one infected person is enough to start a large cluster.