1. Virologically confirmed symptomatic infection of Covid-19. Measurement time: from 14 days after the candidate's last dose. 2. Confirmed Covid-19 infection with signs of severe systemic disease. Measurement time: from 14 days after the candidate's last dose. 3. Confirmed SARS-Cov-2 infection from routine surveillance or determinations of the presence of antigens. Measurement time: from 14 days after the candidate's last dose. 4. Death from causes directly attributable to a complication of COVID-19. Measurement time: from 14 days after the candidate's last dose. 5. Case Cumulative incidence: Measurement time: from 14 days after the candidate's last dose.

1. Virologically confirmed symptomatic infection of Covid-19. Measurement time: from 14 days after the candidate's last dose. 2. Confirmed Covid-19 infection with signs of severe systemic disease. Measurement time: from 14 days after the candidate's last dose. 3. Confirmed SARS-Cov-2 infection from routine surveillance or determinations of the presence of antigens. Measurement time: from 14 days after the candidate's last dose. 4. Death from causes directly attributable to a complication of COVID-19. Measurement time: from 14 days after the candidate's last dose. 5. Case Cumulative incidence: Measurement time: from 14 days after the candidate's last dose.