According to the provisions of Articles 11 and 12 of the Compulsory Education Law of People's Republic of China (PRC), parents or other legal guardians of children who have reached the age of six should send them to school to receive and complete compulsory education; Children in areas where conditions are not available can be postponed to seven years of age. School-age children and adolescents who need to postpone or drop out of school due to their physical condition shall apply to their parents or other legal guardians, and be approved by the education administrative department of the local township people's government or the county-level people's government. School-age children and adolescents are exempt from the test. Local people's governments at all levels shall ensure that school-age children and adolescents are enrolled in the nearest place where they are registered. ……

However, according to Article 27 of the Regulations on the Administration of Vaccine Circulation and Vaccination promulgated by the State Council on March 24, 2005, nursery institutions and schools should check the vaccination certificate when children enter kindergarten and school, report to the local county-level disease prevention and control institutions or vaccination units where children live, and cooperate with the disease prevention and control institutions or vaccination units to urge their guardians to go to the vaccination units in time after children enter kindergarten and school.

Therefore, I think that if school-age children are not vaccinated as required, the school has no right to prevent their children from going to school, but it has the right and obligation to check the child's vaccination certificate, report to the relevant institutions, and urge their guardians to replant at the vaccination unit in time after the child enters school. But in any case, it is wrong for schools to prevent children from going to school, which violates the compulsory education law.