widespread resistance of malaria parasite to drugs like chloroquine has prompted attempts to combat malaria. why is it difficult to develop an effective malaria vaccine
Question
Widespread resistance of malaria parasite to drugs like chloroquine has prompted attempts to combat malaria. Why is it difficult to develop an effective malaria vaccine?
A
Malaria is caused by several species of Plasmodium.
B
Vaccines can be developed only against bacteria.
C
Man does not develop immunity to malaria during natural infection.
D
Man is only an intermediate host and not the definitive host.
