Which One of the Following Is a Problem Associated with Traditional

Multiple Choice

Which one of the following is a problem associated with traditional vaccines as opposed to vaccines produced by transgenic organisms?

A) Traditional vaccines are always in short supply.
B) Traditional vaccines may result in disease symptoms because they contain killed or weakened organisms.
C) Traditional vaccines can only be given after infection; they cannot prevent infection.
D) Traditional vaccines must be given in larger quantity.
E) Traditional vaccines are more expensive.