<prompt> If a new effective treatment is initiated for a communicable disease and all the other factors remain the same, which of the following is most likely to happen?Incidence will not changePrevalence will change but incidence will not changeNeither incidence nor prevalence will changeIncidence and prevalence both will change  <response>: In an infectious disease case, as the prevalence comes down, the number of infective people in the community also comes down and hence incidence also comes down. 