Tables of face mask compliance in different settings (outdoor, indoor, and shopping malls) and exposure categories (age group, gender, and region) in Chennai, India.

Tables of face mask compliance in different settings (outdoor, indoor, and shopping malls) and exposure categories (age group, gender, and region) in Chennai, India.</p

Compliance with appropriate usage of face masks at various time points during the COVID-19 pandemic in the city of Chennai, India.

Compliance with appropriate usage of face masks at various time points during the COVID-19 pandemic in the city of Chennai, India.</p

Compliance with appropriate usage of face masks in the various study settings by geographical regions over the three rounds, Chennai, India.

Compliance with appropriate usage of face masks in the various study settings by geographical regions over the three rounds, Chennai, India.</p

Compliance with appropriate usage of face masks in the various study settings by age groups over the three rounds, Chennai, India.

Compliance with appropriate usage of face masks in the various study settings by age groups over the three rounds, Chennai, India.</p

Compliance with appropriate usage of face masks in the various study settings by gender over the three rounds, Chennai, India.

Compliance with appropriate usage of face masks in the various study settings by gender over the three rounds, Chennai, India.</p

Compliance with appropriate face mask usage within each study setting (outdoor/indoor & slum/non-slum) in Chennai compared across the five rounds.

Compliance with appropriate face mask usage within each study setting (outdoor/indoor & slum/non-slum) in Chennai compared across the five rounds.</p

Study sites of mask survey, Chennai, Tamil Nadu, India, 2021.

We obtained the spatial data to construct the map from the following open-access sources: https://data.opencity.in/dataset/gcc-ward-information [16].</p