预防疾病蔓延 meaning in English

prevent a disease from spreading

At level 1 , if sars cases were occurring in a sporadic manner , the steering committee would be chaired by the secretary for health , welfare and food . it would formulate overall disease - control strategy and decide on the measures appropriate to different scenarios
第一级疫情是指出现零星沙士个案， ?生福利及食物局局长将担任督导委员会主席，制订整体疾病控制策略，并决定应采取何种措施以预防疾病蔓延。