The coronavirus might have already unfold by way of the air flow system at an condominium advanced in South Korea the place a number of residents from totally different households grew to become contaminated, in line with a examine.
The cluster was investigated after a collection of recent COVID-19 instances had been recognized in August on numerous flooring of the residential advanced in Seoul, in line with the paper within the International Journal of Infectious Diseases.
On Aug. 23, a girl dwelling on the sixth ground examined optimistic, adopted by her husband and daughter.
The subsequent day, a baby who lived within the unit just under went to the hospital for a urologic drawback and likewise examined optimistic for the virus, researchers wrote.
When yet one more girl who lived immediately beneath them on the fourth ground was recognized with COVID-19, well being officers determined to check all 437 residents.
The mom of the contaminated baby additionally examined optimistic, together with two extra residents who lived in models immediately above them on the tenth and eleventh flooring, researchers mentioned.
Two extra instances had been then present in different models on the second and eleventh flooring of the tower.
Those models aren’t immediately above or beneath the others, however are on the identical vertical line as one another and do share the identical air flow system, researchers mentioned.
“All patients reported that they are not acquaintances of each other and denied a history of interpersonal contact,” researchers wrote.
Researchers mentioned it’s potential that the virus unfold by way of shared areas, resembling elevators.
But they famous that every one the contaminated residents had reported carrying masks outdoors their flats — and two had denied even utilizing the elevators.
They additionally identified that “among the residents of over 200 households who may use the same elevators, all the patients were found in only two vertical lines of the building.”
“Each line was connected through a single air duct in the bathroom for natural ventilation,” researchers wrote.
“Our investigation found no other possible contact between the cases than the airborne infection through a single air duct in the bathroom.”
Researchers, nonetheless, observe that there have been some limitations to the examine since they had been unable to take air samples.
But the findings recommend that extra analysis is warranted into the potential threat.
“More people may have to stay indoors during the pandemic to avoid interpersonal contact,” researchers concluded.
“However, some may be exposed to viral infection by inhalation due to inadequate ventilation systems.”