Final answer:
The mortality rate is the proportion of deaths in a population due to a disease, and it is what the second 'M' in MMWR stands for.
Step-by-step explanation:
The correct option is Option 1: Mortality. The mortality rate is a measure used to describe the percentage of people who die from a disease within a specified population and time period. Diseases like AIDS, Ebola, and plague typically have high mortality rates. This rate can be expressed in various ways, such as the number of deaths per 100,000 individuals. In the context of public health reporting, the second 'M' in MMWR (Morbidity and Mortality Weekly Report), a publication by the CDC, stands for 'Mortality.' Whereas morbidity rate refers to the incidence of disease in a population, mortality rate specifically quantifies death.