A student has his temperature checked at the entrance of a school in Bangkok, Thailand, July 1, 2020. Schools in Thailand reopened on Wednesday. (Xinhua/Rachen Sageamsak)

Students wearing face masks take a break at a school in Bangkok, Thailand, July 1, 2020. Schools in Thailand reopened on Wednesday. (Xinhua/Rachen Sageamsak)

Students talk with each other with a plastic sheet separating them at a school in Bangkok, Thailand, July 1, 2020. Schools in Thailand reopened on Wednesday. (Xinhua/Rachen Sageamsak)

Students wearing face masks take a break at a school in Bangkok, Thailand, July 1, 2020. Schools in Thailand reopened on Wednesday. (Xinhua/Rachen Sageamsak)

A student has her hands sanitized at the entrance of a school in Bangkok, Thailand, July 1, 2020. Schools in Thailand reopened on Wednesday. (Xinhua/Rachen Sageamsak)

Students wearing face masks take a break at a school in Bangkok, Thailand, July 1, 2020. Schools in Thailand reopened on Wednesday. (Xinhua/Rachen Sageamsak)