Microorganisms and Disease
Lactoferrin helps to protect against pathogens by

sequestering Iron
lowering the pH
blocking sebum production
facilitating the growth of normal flora

ANSWER DOWNLOAD EXAMIANS APP

Microorganisms and Disease
The influenza vaccine is administered each year because

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

ANSWER DOWNLOAD EXAMIANS APP