⚠️Airplane outbreak on a February London==>Hanoi Vietnam Airlines flight ✈️. Two key findings:
📌In business class, attack rate was 62% (13/21)
📌Among pax seated w/in 2 meters (2 biz seats) from case 1, 11 (92%) were #SARSCoV2 positive!
➡️ Flights not safe. #COVID19 🧵 below
2) Of the 15 persons with flight-associated cases, 12 (80%) had traveled in business class with case 1, and 2 travelers (cases 14 and 15) and 1 flight attendant (case 16) had been in economy class.
3) the London woman had traveled to Milan and Paris for Paris Fashion Week (conventions again!!!) just before her London flight to Hanoi on March 1st.
➡️ we know these international travel is what makes pandemic spread so fast across globe.
4) 21 occupied business (75% seats occupied), 35 premium economy (100%), & 145 economy (67%) seats (Figure 1). Two meals were served, and flight attendants worked in 2 teams, 1 for business and premium economy sections and 1 for the economy section.
➡️Flight wasn’t even full!
5) Seating proximity was strongly associated with 📌7x increased infection risk (risk ratio 7.3, 95% CI 1.2–46.2). We found no strong evidence supporting alternative transmission scenarios.
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