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