This is a randomized, double-blinded, Phase II study in healthy males and non-pregnant females 19 years and older. This clinical trial is designed to assess the safety, reactogenicity, and immunogenicity of a pre-pandemic 2017 monovalent inactivated influenza A/H7N9 virus vaccine (2017 H7N9 IIV) administered at different dosages given with or without adjuvant. 3.75 mcg of HA per dose will be administered with phosphate buffered saline (PBS) diluent and AS03 adjuvant, 7.5 mcg and 15 mcg of HA per dose will be administered with AS03 adjuvant only, and 15 mcg and 45 mcg of HA per dose will be administered without adjuvant. Eligible subjects will be randomized into one of 5 study groups, stratified by age. The study will enroll up to 420 individuals 19-64 years old and up to 300 individuals who are 65 years old and older. The study duration is approximately 16 months with subject participation duration approximately 13 months. The primary objectives of this study are: 1) to assess the safety and reactogenicity following receipt of two doses of 2017 H7N9 IIV administered intramuscularly at different dosages approximately 21 days apart given with or without AS03 adjuvant; 2) to assess the serum hemagglutination inhibition (HAI) and neutralizing (Neut) antibody responses following receipt of two doses of 2017 H7N9 IIV administered intramuscularly at different dosages approximately 21 days apart with or without AS03 adjuvant, stratified by age of recipient. The secondary objectives are: 1) to assess unsolicited non-serious adverse events (AEs) following receipt of two doses of a 2017 H7N9 IIV administered IM at different dosages approximately 21 days apart with or without AS03 adjuvant; 2) to assess medically-attended adverse events (MAAEs) including new-onset chronic medical conditions (NOCMCs), potentially immune-mediated medical conditions (PIMMCs), and all serious adverse events (SAEs) following receipt of two doses of a 2017 H7N9 IIV administered IM at different dosages approximately 21 days apart with or without AS03 adjuvant; 3) to assess the serum HAI and Neut antibody responses approximately 7 and 21 days following receipt of a single dose, and approximately 7 days following receipt of two doses of 2017 H7N9 IIV administered IM at different dosages approximately 21 days apart with or without AS03 adjuvant, stratified by age of recipient.
This is a randomized, double-blinded, Phase II study in healthy males and non-pregnant females 19 years and older that is designed to assess the safety, reactogenicity, and immunogenicity of a pre-pandemic 2017 monovalent inactivated influenza A/H7N9 virus vaccine (2017 H7N9 IIV) administered at different dosages given with AS03 adjuvant and phosphate buffered saline (PBS) diluent, with AS03 adjuvant only, and without adjuvant. Eligible subjects will be randomized into 5 study groups, stratified by age. The study will enroll up to 420 individuals 19-64 years old and up to 300 individuals who are 65 years old and older. Study duration is approximately 16 months with subject participation duration approximately 13 months. The primary objectives of this study are: 1) to assess the safety and reactogenicity following receipt of two doses of 2017 H7N9 IIV administered intramuscularly at different dosages approximately 21 days apart given with or without AS03 adjuvant; 2) to assess the serum hemagglutination inhibition (HAI) and neutralizing (Neut) antibody responses following receipt of two doses of 2017 H7N9 IIV administered intramuscularly at different dosages approximately 21 days apart with or without AS03 adjuvant, stratified by age of recipient.