This is a double-blind, triple dose, parallel, randomized design study comparing two different dose levels and immunization regimen of a novel COVID-19 vaccine candidate - TURKOVAC - against SARS-CoV-2 infection, to assess the efficacy and safety of these vaccine strengths after 3rd dose vaccination. This study will also provide more data to assess the efficacy of the 3rd dose vaccination (booster dose) for COVID-19 prophylaxis including comparison to a cohort of standard convalescent serum samples obtained from World Health Organization (WHO).~This study will be completed in 12 months.
The objective of this study is to evaluate the efficacy, immunogenicity and safety of two different strengths (3 µg/0.5 mL and 4,5 µg/0.5 mL) of inactivated COVID 19 Vaccine- TURKOVAC in healthy subjects following 3rd vaccination to demonstrate clinical evidence in prophylaxis of COVID 19.