Answer:
The answer is- To help predict the future frequency of diseases
Explanation:
System analysis helps to study a system and its components in order to identify its objectives, it is a problem solving technique which helps to improve the system.
System analysis includes some holistic approach such as system thinking which has various uses that include;
The prevalence of HIV/AIDS i 2020 being estimated taking into account the factors related to the disease is a prediction of future frequency of the disease.