Microbiology 9th Edition by Laura Black, Jacquelyn Black

تمرين 32

Why are colds difficult to treat and prevent?
(a) Different cold viruses predominate during different seasons.
(b) Because there are so many different types of rhino- and coronaviruses, each with different antigens, development and administration of vaccines are currently prohibitive.
(c) Although some human interferons have been shown to block or limit rhinovirus infections, delivery to infection sites is difficult, and unwanted side effects can occur.
(d) All of the above.
(e) Both a and c.