Table 1.

MuCV effectiveness in a mumps outbreak in Anhui province, China, 2014–2015.

Vaccination status	cases	Exposed persons	AR (%)	RR* (95%CI)	VE (%,95%CI)
Un-vaccinated	93	530	17.5	Ref	Ref
1 dose	123	1165	10.6	0.60(0.47,0.77)	40(23,53)
≥ 2 doses	21	213	9.9	0.56(0.36,0.88)	44(12,64)

^*RR: relative risk