¿Cuáles son las formas más eficaces de reducir el riesgo de contraer el VIH? ¿Cómo te mata el SIDA?

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

other information encoded in your genes might distinguish you from the others in the group