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The article published by Mendoza et al. 1 reaffirms the need to conduct mass testing to detect the new variants of SARS-CoV-2, and requests that the population remain cautious even after testing negative for infection. In this article, we emphasize the need to guarantee access to mass testing among symptomatic patients considering the presence of vulnerable populations particularly in low-and middle-income countries. With an excess of 355 deaths per 100 000 people between March 2020 and March 2021, Peru is one of the countries most affected by the coronavirus disease 2019 (COVID-19) pandemic. 2 Due to the increasing number of cases in 2021, country level diagnostic capabilities serve two main objectives: early identification and treatment of cases, and achieving accurate reporting of the number of deaths due to COVID-19. In contrast, Uruguay, one of the countries with the lowest contagion and …