To perform chest compressions on an adult one hand is placed on top of the other with the heel of the lower hand pressing

60 minutes or more of a combinationof aerobic and muscle-strengtheningexercises physical activity recommendation.adults

The answer you're looking for is washing your hands. "at this late date, we all expect our doctors to wash their hands before examining us or performing an operation in order to prevent the spread of infection. surprisingly, physicians did not begin to acknowledge the lifesaving power of this simple act until 1847.it was then that dr. semmelweis began exhorting his fellow physicians at the famed vienna general hospital (allgemeines krankenhaus) to wash up before examining women about to deliver babies. his plea was far more than aesthetic; it was a matter of life and death and to prevent a deadly malady known as “childbed” or puerperal (from the latin words for child and parent) fever." 

It is anti retroviral therapy  but you didn't show me what choices i have.