The correct options are
A Vaccination
C Wearing a mask while visiting patients in hospitals.
D Maintaining the proper hand hygiene.
Some of the ways in which an infection can be prevented are as follows.
-Maintain personal hygiene.
-Keep kitchen clean by washing utensils, dishes, cooking area before and after preparing food.
-Vaccination
-Keep both bathroom and toilet area clean.
-Avoid sharing personal belongings such as a razor, drinking glass, toothbrush, comb, etc.
-Do not travel or go to work when you fall ill.
-While visiting patients in hospitals, it is recommended to wear a mask or gown and if possible make use of sanitizing gels to prevent infection.