Phase I Safety and Immunogenicity of Live Attenuated Influenza H5 Candidate Vaccine Strain A/17/Turkey/Turkey/05/133 (H5N2) in Healthy Thai Volunteers

Inclusion Criteria:

• Healthy
• Age 18-49 years old
• Having Thai ID card or equivalent
• Are seronegative to the specific H5 influenza virus determined by antibody titer less than 1:40 by HAI test to the corresponding antigen.
• Anti HIV - Negative
• All hematology & biochemistry and urine analysis are within normal range or of no clinical significance (not more than 1.5 times of normal value)
• Able to read and write and sign written informed consent.

Exclusion Criteria:

• Known history of egg allergy
• Having had recently influenza infection confirmed as H5
• History of bronchial asthma
• History of chronic lung diseases
• History of chronic rhinitis
• History of immunodeficiency state
• History of immunosuppression
• History of heavy smoking (more than 5 rolls per day)
• History of alcoholic (pure drink 200 ml per day)
• Acute infectious and noninfectious diseases (within 2 weeks)
• Exacerbation of chronic diseases or cancer or HIV positives
• Anamnestic leukocytosis, hepatitis B and C positives
• The volunteers who have been taking immunoglobulin products or have had a blood transfusion during past three months before the beginning of the experiment
• Participation in other research study or stop participant less than 1 month
• Pregnancy or plan to become pregnant for 60 days after enrollment or breast feeding
• Any concomitant medication with Aspirin
• The volunteers who have family members with immunodeficiency
• Poultry workers
• Have undertaken international travel within the one week prior to immunization