The skin is the first line of defense in preventing penetration by infectious agents. However, the skin can be bypassed. Which of the
following scenarios allows an infectious agent to enter the body without damaging the skin?
OA. A girl gets a staph infection when she falls and scrapes her knee.
OB. A person is infected with malaria when a mosquito bite punctures his skin.
OC. A pathogen is transferred from a mother to her baby during pregnancy or birth
OD. A boy is infected with rabies when a dog bites his leg