COVID-19 Effectiveness Study in the Philippines

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

Status

UNKNOWN

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT05518760

Enrollment

3000

Registered

2022-08-29

Start date

2022-11-09

Completion date

2024-03-15

Last updated

2022-12-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

COVID-19, Hospitalized COVID-19, Vaccine Effectiveness Against COVID-19

Keywords

COVID-19, Vaccine effectiveness, hospitalized COVID-19, inactivated COVID-19 vaccine

Brief summary

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.

Interventions

OTHERno intervention

no intervention

Study design

Observational model

CASE_CONTROL

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

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

Design outcomes

Primary

Measure	Time frame
Number of hospitalized virologically-confirmed SARS-CoV-2 infection	1 year

Countries

Philippines

Contacts

Primary ContactKristal An C Agrupis, MD, MSc

kcagrupis@up.edu.ph+63 2 8559 0199

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026