春季常见的呼吸道传染病有流行性脑脊髓膜炎(简称流脑)、猩红热、流行性感冒(简称流感)、流行性腮腺炎(俗称痄腮)和风疹。这五种传染病中,除流感都可使儿童、成人容易感染外,其余四种常在儿童时期感染发病,而成年人往往成为传播这些疾病的隐性传染源。流脑和猩红热是由细菌引起来的,用青 Common respiratory infections in spring include epidemic cerebrospinal meningitis (referred to as brain meningitis), scarlet fever, influenza (referred to as flu), mumps (commonly known as cockroaches) and rubella. Among the five infectious diseases, except for influenza, which can make children and adults vulnerable to infection, the other four are often infected during childhood, and adults often become the hidden sources of transmission of these diseases. Runny nose and scarlet fever are caused by bacteria, with blue