One of the best ways to break the chain of infection is to
A) wash your hands frequently.
B) avoid disinfectant agents when cleaning your house.
C) get boosters for immunizations 6 months early.
D) drink water only if it is fluoridated.
Correct Answer:
Verified
Q4: T cells and B cells are the
Q9: White blood cells are produced in the
A)brain.
B)bone
Q10: The natural environment in which a pathogen
Q11: All of the following are types of
Q12: A type of white blood cell that
Q13: Macrophages act as _ of worn-out cells.
A)scavengers
B)healers
C)vectors
D)suppressors
Q15: The body's first line of defense against
Q17: Obstacles to microorganisms entering the body include
Q18: Which of the following is not a
Q19: An organism that causes disease is a(n)
A)antigen.
B)toxin.
C)pathogen.
D)antibody.
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