Avoidance of sun exposure is mostly connected to more time spent indoors, where the ventilation is lower with higher CO2 buildup, viral exposure, and indoor pol

Avoidance of sun exposure is mostly connected to more time spent indoors, where the ventilation is lower with higher CO2 buildup, viral exposure, and indoor pollution (mostly VOCs, but also Ozone, and also particulate and NO2 pollution (for gas stoves) from kitchens, etc.). However, outdoor time would have slightly more exposure to vehicular pollution, but likely less to nanoparticles in the case of gas stove usage (https://www.earth.com/news/gas-stoves-release-more-harmful-nanoparticles-than-vehicle-exhaust/ https://www.earth.com/news/gas-stoves-release-more-harmful-n...).