What do people do to put their health at risk? Why do they do it?

Larry is taking a walk in the park, the pollen in the air makes him sneeze consistently what line of defense is his immune system exhibiting

If a person has a bad pain in their back, specifically lower back a bit above the hip, what should they do besides going to the doctor? what remedies could they use?

What is the proper way to determine that someone is unresponsive before administering cpr