The study examined how well pedestrians in Peru wore masks during the first and second waves of COVID-19 in busy indoor public spaces.
Researchers observed nearly 2000 participants and found consistent overall mask usage rates but a notable drop in correct mask use from 81.9% in 2020 to 60.3% in 2021.
Additionally, regional differences highlighted higher misuse rates in cities like Lima and Piura during both waves, emphasizing the need for targeted public health messaging.