Digital tools for COVID-19 contact tracing: annex: contact tracing in the context of COVID-19

Contact tracing is an essential public health measure and a critical component of comprehensive strategies to control the spread of COVID-19. Contact tracing breaks the chains of human-to-human transmission by identifying people exposed to confirmed cases, quarantining them, following up with them to ensure rapid isolation, and testing and treatment in case they develop symptoms. When implemented systematically and effectively, these actions can ensure that the number of new cases generated by each confirmed case is maintained below one.