Microorganisms and Disease
All infections do not cause fever and all fevers are not due to infections which of the following is an example of non-infections cause of fever?

Typhoid
Chicken pox
Rheumatic disease
Malaria

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Microorganisms and Disease
The influenza vaccine is administered each year because

None of these
the vaccine is sufficiently toxic to make it necessary to administer only a small amount at any one time
it is a polysaccharide vaccine that does not confer long-term protection
mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines

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Microorganisms and Disease
What is common in catheters and ventilators?

They predispose patients to viral rather than bacterial infections
They are used primarily in neonatal intensive care units
They bypass important defenses of the body
Bacteria responsible for associated infections are usually susceptible to antibiotics

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