to gain the most cardiovascular benefits during exercise your heart rate should remain in which percentage of your maximum heart rate?

Blood transfusions were rarely done and often fatal; they were outlawed until the nineteenth century.

Hiv can be transmitted through oral sex. you can get hiv through vaginal fluid and semen. if you have an open sore or cut in or near your mouth and an you get the semen or vaginal fluid of an infected person in those cuts or sores, you can get hiv