| Abstract |
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Research Methods: A cross-sectional study involving 425 individuals in 40 neighborhood clusters was carried out between March and April 2021. The seroprevalence data was measured using immunoglobulin G (Ig-G) SARS-CoV-2 antibody titers using the enzyme-linked immunosorbent assay (ELISA) test. Socio-demographic information and the risk factors of the participants was obtained from interviews using a structured questionnaire.
Results: A total of 31.1% of individuals were seropositive, and higher seroprevalence was found in the peri-urban areas. Seroprevalence was found higher in females (31.9%), individuals aged 55-64 years old (43.7%), and worked as housewives (22.7%). Individuals aged 65 years and above have 20% higher risk of being seropositive compared to children. Higher proportion of seropositivity reported in individuals with lower mobility, such as always staying at home except for important matters (47.7%) and never attending any traditional activities/events and visiting relatives (>50%). Family clusters accounted for 10.6?ses. Among the seropositive cases, 93.2% have not yet been vaccinated with COVID-19 vaccines. In the last six months prior to data collection, 99.2% did not have prior diagnoses of COVID-19, but symptoms such as headache (15.2%), cough (14.4%), and runny nose (12.9%) were the most common symptoms reported by the seropositive individuals.
Conclusion: This study result showed a discrepancy with COVID-19 confirmed cumulative incidence data reported in the same period (11 out of 1000 population), indicating silent transmission may have occurred within the community. Higher seroprevalence in peri-urban areas, rather than in urban areas, suggesting a gap in access to health services. Surveillance improvement through testing, tracing, treatment (3Ts) particularly in areas with lower access to health services are necessary, along with stronger implementations of health protocols in activities that require higher mobility.
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