are very different during early stages of an emerging epidemic <*> middle stages
where the infection rate is low ,
The decisions facing policy makers are very different during early stages of an emerging epidemic where the infection rate is low , middle stages where the rate is rapidly climbing , and later stages where the epidemic curve has flattened to a low and relatively sustainable rate .
The decisions facing policy makers are very different during early stages of an emerging epidemic where the infection rate is low , middle stages where the rate is rapidly climbing , and later stages where the epidemic curve has flattened to a low and relatively sustainable rate .