Review Question - QID 214978

A pharmaceutical company has developed a new drug for treating a novel virus (NoV) that is circulating in the community. You are consulted to help with their assessment of the market for the new drug. The number of new NoV cases per day is given by x and is constant over time. The cure rate, or the number of cases that are cured per day, is given by y. The infection fatality rate, or the number of deaths from NoV infection per day, is given by z. Assume that death rates in uninfected or recovered individuals are negligible, recovery from NoV infection confers long-term protective immunity, and there is no migration into or out of the population. The only effects of the new drug are to increase the cure rate (y) and decrease infection fatality rate (z). What is the expected trend in the prevalence and incidence of NoV after the new drug reaches the market?