Which factor is a key component of health

Which statement is true about common childhood infectious disease? a. children should always be given antibiotics to treat an infectious illness. b. frequency of infectious illnesses usually increases as children grow older. c. having a minor infectious illness weakens a child's immune system. d. infectious illnesses are usually mild and require no medication.

True or false mucous membranes destroy pathogens on the outer body surface, at body openings.

How quickly a drug enters your bloodstream also depends on