So the Delta variant has made things more difficult, but, ultimately, vaccines and the other layered mitigation -- in particular, ventilation and masking -- can and will help stop transmission in schools.
因此,Delta 变种使事情变更加困难,但最终,疫苗和其他分层缓解措施——特别是通风和掩蔽——可以而且将有助于阻止学校传播。