go down with something
phrasal verb with go verb uk/ɡəʊ/ us/ɡoʊ/ going | went | gone
UK (also come down with something)
B2 患（传染病），感染上（…病）
to start to suffer from an infectious disease
Half of Martha's class has gone down with flu. 玛莎班上有一半的学生得了流感。