Hepatitis A & B:
These are vaccinations that you should seriously consider getting before you travel. Unlike most of the other diseases (such as yellow fever and malaria), hepatitis is most often passed from person to person due to less-that-sanitary cleaning procedures in restaurants and other food/beverage establishments. It is also not a country specific problem. I highly recommend at least getting the Hep B vaccination.
New Zealand - no vaccinations are required.
India - a certificate of immunization for yellow fever will be required IF you have visited the following countries in Africa before entering India (So. Africa is not in this list):
Angola, Benin, Burkina Faso, Burundi, Cameroon, Central African Republic, Chad, Congo, Côte d'Ivoire, Democratic Republic of Congo, Equatorial Guinea, Ethiopia, Gabon, The Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Liberia, Mali, Niger, Nigeria, Rwanda, São Tomé and Principe, Senegal, Sierra Leone, Somalia, Sudan, Tanzania, Togo, Uganda, Zambia
So. Africa - yellow fever is recommended but not required.
Anti-Malarials for these areas:
Both So. Africa and India are confirmed to be Chloroquine-resistent areas. Meflaquine, Doxycycline or Malarone are the recommended anti-malarials. Meflaquine has a history of causing nightmares and/or hallucinations in some people. Doxycycline is not recommended for women using oral contraceptives. Malarone is a more expensive anti-malarial and is taken more frequently, but does not have the side effects associated with Meflaquine, and it does not interfere with OCs.
Rabies - rabies is recommended if you will be doing wildlife work while traveling, or you will be in rural areas most of the time. If not, common sense is the best way to avoid encountering rabies.
Here is the link for the the vaccination recommendations for UK residents:
Hope this helps.