We report the clinical features of two cases of human infection with influenza A virus subtype H9N2 in Hong Kong, and show that serum samples from blood donors in Hong Kong had neutralising antibody suggestive of prior infection with influenza H9N2.
M Peiris, K Y Yuen, C W Leung, K H Chan, P L Ip, R W Lai, W K Orr, and K F Shortridge.
Lancet. 1999 Sep 11; 354 (9182): 916917916-7.
AbstractWe report the clinical features of two cases of human infection with influenza A virus subtype H9N2 in Hong Kong, and show that serum samples from blood donors in Hong Kong had neutralising antibody suggestive of prior infection with influenza H9N2.