A staff member disinfects a classroom at a school in Colombo, Sri Lanka, Jan. 24, 2021. Sri Lankan Education Department officially declared Grade 11 of all schools in Western Province will resume class from Jan. 25 except the schools in the isolated areas, as the GCE Ordinary Level Examination (O/L) is due to be conducted in March. (Photo by Ajith Perera/Xinhua)

People clean up at a school in Colombo, Sri Lanka, Jan. 24, 2021. Sri Lankan Education Department officially declared Grade 11 of all schools in Western Province will resume class from Jan. 25 except the schools in the isolated areas, as the GCE Ordinary Level Examination (O/L) is due to be conducted in March. (Photo by Ajith Perera/Xinhua)