COVID-19 Effectiveness Study in the Philippines

A Multicenter Study to Assess the Effectiveness of an Inactivated COVID-19 Vaccine Against Hospitalized COVID-19

This is a multi-site, observational, prospective test negative design case-control study which primarily aims to determine the protective effectiveness of 2 doses of an inactivated COVID-19 vaccine at least 14 days after the second dose, against hospitalized virologically-confirmed SARS-CoV-2 infection.

Inclusion Criteria:

• Written informed consent.
• Aged 18 years of age and above
• Residing in the catchment area of the participating hospital
• Admitted to the participating hospital with an acute respiratory illness
• Able and willing to provide a naso- and oro-pharyngeal swab for RT-PCR testing

Exclusion Criteria:

• 6.2.2.1 Refusal to participate