phase 1: 1. Healthy male or female aged 18-60 years 2. Volunteers are able to understand and sign the informed consent 3. Be able to show legal identity card for the sake of recruitment 4. Voluntarily receive a dose of influenza A (H1N1) 2009 monovalent vaccine [clinicaltrials_resource:16731cb5eb4a4220e03e050d8af2736c]

phase 1: 1. Healthy male or female aged 18-60 years 2. Volunteers are able to understand and sign the informed consent 3. Be able to show legal identity card for the sake of recruitment 4. Voluntarily receive a dose of influenza A (H1N1) 2009 monovalent vaccine [clinicaltrials_resource:16731cb5eb4a4220e03e050d8af2736c]