The coronavirus might have unfold via the air flow system at an condo complicated in South Korea the place a number of residents from completely different households turned contaminated, in accordance with a examine.
The cluster was investigated after a collection of recent COVID-19 circumstances have been recognized in August on numerous flooring of the residential complicated in Seoul, according to the paper in the International Journal of Infectious Diseases.
On Aug. 23, a girl dwelling on the sixth flooring examined optimistic, adopted by her husband and daughter.
The subsequent day, a toddler who lived within the unit just under went to the hospital for a urologic downside and likewise examined optimistic for the virus, researchers wrote.
When one more girl who lived instantly under them on the fourth flooring was identified 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 instantly above them on the tenth and eleventh flooring, researchers stated.
Two extra circumstances have been then present in different models on the second and eleventh flooring of the tower.
These models aren’t instantly above or under the others, however are on the identical vertical line as one another and do share the identical air flow system, researchers stated.
“All sufferers reported that they aren’t acquaintances of one another and denied a historical past of interpersonal contact,” researchers wrote.
Researchers stated it’s potential that the virus unfold via shared areas, akin to elevators.
However they famous that every one the contaminated residents had reported sporting masks outdoors their residences — and two had denied even utilizing the elevators.
In addition they identified that “among the many residents of over 200 households who might use the identical elevators, all of the sufferers have been present in solely two vertical strains of the constructing.”
“Every line was related via a single air duct within the toilet for pure air flow,” researchers wrote.
“Our investigation discovered no different potential contact between the circumstances than the airborne an infection via a single air duct within the toilet.”
Researchers, nevertheless, notice that there have been some limitations to the examine since they have been unable to take air samples.
However the findings counsel that extra analysis is warranted into the potential danger.
“Extra individuals might have to remain indoors throughout the pandemic to keep away from interpersonal contact,” researchers concluded.
“Nevertheless, some could also be uncovered to viral an infection by inhalation as a result of insufficient air flow programs.”