Table 2. Similarity of HIV genetic sequence of viral nucleic acid from the index case-patient and the 5 women infected by during nosocomial HIV outbreak, Hangzhou, China, 2016–2017.

Region	Sequence similarity, %
	Case-patient 1	Case-patient 2	Case-patient 3	Case-patient 4	Case-patient 5	Mean
gag	99.70	100.00	100.00	100.00	100.00	99.95
pol	99.50	99.40	99.50	99.50	99.50	99.48
env	100.00	100.00	100.00	100.00	99.60	99.92