Which of the following is NOT one kind of pathogen

One reason the skin acts as a barrier against pathogens is because pathogens

A kind of white blood cell that destroys pathogens is a(n)

One function of T cells is to

HIV is spread by all of the following EXCEPT

When a person has an allergy his or her immune system is overly sensitive to a foreign substance called a(n)

Which of the following diseases might you catch by sharing a water glass with another person

People with diabetes may not have enough

Cancer is a disease in which

All of the following are carcinogens EXCEPT

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