Comparison of the Cellular and the Humoral Immunogenicity, Safety of Different Trivalent Influenza Vaccines

Overview

This is a randomized, single-blinded, Phase IV, monocentric study in healthy adults aged \> 18 and \< 60 years to evaluate the cellular and humoral immunogenicity as well as the reactogenicity of intramuscular, inactivated, trivalent influenza vaccines, including aluminium adjuvanted whole virus vaccine, split vaccine and subunit vaccine.

This is a randomized, single-blinded study on vaccines for prevention of influenza. Three study visits will be scheduled for each study subject, at Day 0, Day 9-11 and Day 30-35. Prior to the performance of any protocol procedures, the investigator is will obtain an informed consent from each participant. At the first study visit (Day 0), demographic data, medical history, pre-existing conditions and concomitant medication will be recorded. Physical examination with recording of vital signs will be performed and in case of females of childbearing age, a pregnancy test will be performed. After the subject has qualified eligible, before vaccination, 60 ml venous blood will be taken for base-line immunity tests. Each subject will be randomly allocated to receive one of the three study vaccines, administered as a deep intramuscular (i.m.) injection into the deltoid muscle. The subjects will be blinded for the vaccine regimen. The principal investigator will administer the vaccines filled in ampoule or packed in pre-filled ready-to-use syringes and can thus not be blinded, but the staff and sub-investigators responsible for the routine follow-up and assessments and laboratory personnel will be blinded. A diary card will be given to each subject for recording pre-defined solicited adverse events for the vaccination day and 6 subsequent days and all other adverse events and concomitant medications. At the second study visit (Day 9-11) the diary card will be collected. All adverse events and concomitant medication will be assessed and recorded. A physical examination will be performed and 60 ml venous blood shall be taken for immunity tests. A new diary card will be given to each subject for recording adverse events and concomitant medications. At the third study visit (Day 30-35), the diary card will be collected. All adverse events and concomitant medication will be assessed and recorded. A physical examination will be performed and 60 ml venous blood shall be taken for immunity tests.

Conditions

Interventions

Eligibility

Locations (1)

Outcomes