NCT01906190

Persistence of Immune Response After Vaccination With Influenza Vaccine

Persistence Study of Immune Response After Vaccination With Influenza Vaccine in Healthy Population

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 207 (actual)
• Sponsor: Centers for Disease Control and Prevention, China · Other Government
• Sex: All
• Age: 12 Years – 60 Years
• Healthy volunteers: Accepted

Summary

This clinical study will be performed in subjects aged 12-60 years old enrolled in NCT01310374 who received 2010 seasonal influenza vaccine to evaluate the persistence of the immune response of influenza vaccine up to 24 months after vaccination.

Detailed description

Subjects were previously vaccinated at 12 to 60 years of age with 2010 seasonal influenza vaccine.The persistence phase starts 24 months after the primary vaccination and blood samples will be taken at 6, 12, 18 and 24 months after primary vaccination. Subjects whose antibody titer less than 1:40 at 6 months after primary vaccination will receive a booster dose of influenza vaccine.

Conditions

• Influenza, Human
• Immunisation Reaction

Interventions

Type	Name	Description
BIOLOGICAL	seasonal influenza vaccine	subjects whose antibodies less than 1:40 6 months later after primary vaccination will receive a booster dose of seasonal influenza vaccine

Timeline

• Start date: 2011-08-01
• Primary completion: 2013-03-01
• Completion: 2013-07-01
• First posted: 2013-07-24
• Last updated: 2013-07-24

Locations

1 site across 1 country: China