Table 2. Risk for SARS-CoV-2 infection by seating location among business class passengers on Vietnam Airlines flight 54 from London, UK, to Hanoi, Vietnam, March 2, 2020*.

Seating location in relation to index case	Positive for SARS-CoV-2 by PCR, no. (%)†	Negative for SARS-CoV-2 by PCR, no. (%)	Relative risk	Risk ratio (95% CI)
<2 seats away	11 (92)	1 (13)	0.9	7.3 (1.2–46.2)
>2 seats away	1 (8)	7 (88)	0.1

*SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.
†Excluding the index case.