Explanation: Surveillance is the collection of data, the data which helps to know about problems of health and disease. This data after analysis is essential for taking steps for prevention. Vaccine if needed to be developed for prevention, then this plays an important role.
Do daily challenges such as doing as many pushups as you can one day and the next moving on to how many squats, in this day in age you can find many apps to work out at home with no equipment and for free.