Table 1.

Summary of the H3N2 virus isolate and H3 seropositive rates in nasal swab samples from different origins, sorted by transport distance to Hong Kong (by far to near).

Province of origin	No. of samples	No. of H3 virus isolates	No. (%) H3 seropositive of those tested
Hebei	298	0	58 (19.5)
Henan	28	1	4 (14.3)
Hubei	170	1	36 (21.2)
Zhejiang	13	0	1 (7.7)
Hunan	530	2	108 (20.4)
Guangxi	110	1	25 (22.7)
Hainan	61	0	17 (27.9)
Jiangxi	1,072	12	149 (13.9)
Guangdong, other	4,226	46	936 (22.1)
Zhuhai, Guangdong	11	0	3 (27.3)
Shenzhen, Guangdong	13	0	3 (23.1)
Total	6,532	63 (1%)	1340 (20.5)