Sexually transmitted diseases, influenza, and acute respiratory infections are examples of conditions transmitted directly (person-to-person).
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Q4: Administration of immune globulin confers passive immunity.
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Q6: Eradication of smallpox was successful because of
Q7: Physical environmental factors in the natural history
Q8: The social environment refers to the totality
Q10: When an individual comes into contact with
Q11: Vectors can be considered as one way
Q12: The term generation time relates to the
Q13: Herd immunity refers to protection of a
Q14: Incubation period refers to the time between
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