Students wearing face masks are seen in a class at a school in Tunis, Tunisia, on May 28, 2020. Baccalaureate students resumed classes in Tunis on Thursday. (Photo by Adel Ezzine/Xinhua)

Students wearing face masks are seen in a class at a school in Tunis, Tunisia, on May 28, 2020. Baccalaureate students resumed classes in Tunis on Thursday. (Photo by Adel Ezzine/Xinhua)

A teacher and students wearing face masks are seen in a class at a school in Tunis, Tunisia, on May 28, 2020. Baccalaureate students resumed classes in Tunis on Thursday. (Photo by Adel Ezzine/Xinhua)

A staff member checks the body temperature of a student at the entrance of a school in Tunis, Tunisia, on May 28, 2020. Baccalaureate students resumed classes in Tunis on Thursday. (Photo by Adel Ezzine/Xinhua)

A student gets her body temperature checked at the entrance of a school in Tunis, Tunisia, on May 28, 2020. Baccalaureate students resumed classes in Tunis on Thursday. (Photo by Adel Ezzine/Xinhua)