Travel warnings and advisories can be found at the State Department. Read through this material carefully.
Here is a link to the CDC recommendations for the Indian Subcontinent:
http://www.cdc.gov/travel/indianrg.htm
We won't be spending much time in areas where there is malaria. Although they recommend Mefloquine and not Chloroquine, the opinion in the Third World (where they actually have malaria) is the opposite. Chloroquine is effective against the standard strains of malaria, but not encephalitic malaria. They use mefloquine to treat this. While there hasn't been a case of someone getting encephalitic malaria who was taking mefloquine, if you do get it, they have nothing to treat it with. Also, mefloquine is a nasty drug with lots of unpleasant side effects.