I believe that it creates shocks to try and start the heart up again after a heart attack. (why the sticky pads are put with the heart in the middle)
Explanation:
It is the secound to the last one
Answer:
People should avoid others until their symptoms clear, as it is very contagious when caused by an infection. Most people are safe to go back to work, school, or daycare once symptoms have cleared. Treatment is often only required in severe cases, or when the infection does not clear on its own.
