| In order to study swine influenza virus among crowds of people in HeBei Province , a survey of serum was conducted in four districts and cities of HeBei Province in the method of HI test , to analyze the relation between swine and influenza of people , 1416 unit of serum of man ware collected and its positive rate is 4.9% 8.0% . As low-leveled antibody were discovered among crowds of people, 226 unit of swine serum were collected to investigate the origin of infection, among which 2 unit were positive . It shows that there is really some transmission of swine influenza virus among flocks of swine . It is suggested that crowds of people and flocks of swine be specially supervised to avoid the outbreak and epidemic of influenza. |
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