biostudies-literatureAhmad AMWorld Health OrganizationHealth Services Academy, Islamabad, Pakistane055381https://www.ebi.ac.uk/biostudies/studies/S-EPMC8987211biostudies-literatureUnknown12(4)<h4>Objectives</h4>This study adapted WHO's <b>'</b>Unity Study' protocol to estimate the population prevalence of antibodies to SARS CoV-2 and risk factors for developing SARS-CoV-2 infection.<h4>Design</h4>This population-based, age-stratified cross-sectional study was conducted at the level of households (HH).<h4>Participants</h4>All ages and genders were eligible for the study (exclusion criteria: contraindications to venipuncture- however, no such case was encountered). 4998 HH out of 6599 consented (1 individual per HH). The proportion of male and female study participants was similar.<h4>Primary and secondary outcome measures</h4>Following were the measured outcome measures- these were different from the planned indicators (i.e. two out of the three planned indicators were measured)BMJ openCOVID-19 seroprevalence in Pakistan: a cross-sectional study.PMC8987211F-11-2020-WHO/DAi/HSAHafeez AMasood MAhmad AMAbbasi FShahzad KUmar MfalseCOVID-19 seroprevalence in Pakistan: a cross-sectional study.<h4>Objectives</h4>This study adapted WHO's <b>'</b>Unity Study' protocol to estimate the population prevalence of antibodies to SARS CoV-2 and risk factors for developing SARS-CoV-2 infection.<h4>Design</h4>This population-based, age-stratified cross-sectional study was conducted at the level of households (HH).<h4>Participants</h4>All ages and genders were eligible for the study (exclusion criteria: contraindications to venipuncture- however, no such case was encountered). 4998 HH out of 6599 consented (1 individual per HH). The proportion of male and female study participants was similar.<h4>Primary and secondary outcome measures</h4>Following were the measured outcome measures- these were different from the planned indicators (i.e. two out of the three planned indicators were measured)2022-01-01T00:00:00Z2022 Apr2025-04-04T12:57:43.872Z2025-04-04T12:57:43.872ZS-EPMC89872113538781510.1136/bmjopen-2021-055381