Fig. 2From: A case study investigating the effects of emergency vaccination with Brucella abortus A19 vaccine on a dairy farm undergoing an abortion outbreak in China305-day milk yield within the investigated dairy herd before and after implementing emergency vaccination with A19 vaccine against brucellosis. (A) 305-day milk yield in seropositive and seronegative groups in 2018 prior to vaccination (January 2019) (B) whole herd 305-day milk yield 2017–2020Back to article page