Subtitles section Play video Print subtitles hundreds of Children formed an orderly queue that snakes through Kibera, Nairobi's biggest slum, on Monday. Waiting to enter classes for the first time since March is that Kenya is the last country in East Africa to fully reopen its schools. The World Health Organization has warned that prolonged school closures pose risks for Children, including higher rates of teenage pregnancy, poor nutrition and permanent dropouts. At the Olympic primary school, most boys and girls wore masks as they waited for their temperatures to be taken and sanitizer to be escorted into their hands. But some parents are worried that the danger looks inside in overcrowded classrooms. Maureen Jambo says she believes the Children will be okay, but she's not certain thing. I ask myself like in this school Olympic there are too many students. How will they operate? Some of them do not even know how to wash their hands. How will they be safe in school? Children in grades 48 and 12 returned to class in October so they could prepare for postponed exams.