"...the recent study, conducted by the Guangzhou Center for Disease Control, suggests that the virus not only passes through person-to-person spread at close range, but can travel farther with help from air currents blowing from ventilation systems.
A second study of the same restaurant, this one using a simulation and led by researchers from the University of Hong Kong, concluded that crowded gatherings and "poor ventilation" with little outside air brought into the room created an isolated loop, allowing virus particles to be transferred from table to table....
The Guangzhou study, which has not been peer-reviewed and is set to be published in a U.S. CDC journal in July, focused on 10 coronavirus cases that were traced back to a restaurant in Guangzhou, China, just north of Hong Kong and 600 miles away from Wuhan, the original epicenter of the outbreak.
....Wuhan closed its borders and enforced a lock-down on the city of 11 million on Jan. 23. That same day, the “index case patient," a 63-year-old woman, and her family traveled from Wuhan to Guangzhou, according to the Chinese study....
The following day, their party was seated for lunch on the windowless third-floor dining room of the restaurant as two other families dined at tables that were set close, but not too close, the study said. Later that day, the index patient developed a fever and cough and went to the hospital. Less than two weeks later, nine other diners were infected -- five of them had been seated at separate tables and were not part of the index patient’s family.
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https://abcnews.go.com/Health/study-...ry?id=70443864