Introduction
The World Health Organization declared severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2), the cause of coronavirus disease 2019
(COVID-19,) a pandemic in March 2020. In Kenya, the first confirmed case
was reported in March 2020 [1]; COVID-19 vaccination was initiated
in March 2021. By July 2023, 343,898 confirmed cases and 5,689 deaths
were recorded since the pandemic start [2], rates that remained low
compared with global figures. Kibera informal settlement in Nairobi, one
of sub-Saharan Africa’s largest slums, where COVID-19 prevention
measures were impossible to implement, reported especially low disease
rates. This study evaluated the performance of a rapid test as a
potentially useful serosurveillance tool to determine previous
SARS-CoV-2 infection in a low resource setting.