Which of the following ways have helped in controlling epidemics in India after 1921?

A. Better medical facilities

B. Programmes for mass vaccination

C. Improved Sanitation

D. Inadequate means of transportation and Communication

Choose the correct answer from the options given below

A, B and C Only

The principal reasons for the decline in the death rate after 1921 were increased levels of control over famines and epidemic diseases. The latter cause was perhaps the most important. Improvements in medical cures for these diseases, programmes for mass vaccination, and efforts to improve sanitation helped to control epidemics.