Business Standard / New Delhi August 27, 2008, 1:02 IST A supportive eco-system is developing to ensure safety but since the system is by and large self-regulatory, it will be a while before it is fully secure. N K Ganguly, Former Director General, Indian Council of Medical Research These trials are not easy ... They need a surveillance infrastructure and a supporting eco-system. Both are developing. In another five years, our clinical trials environment will be very good In any clinical trial, tests are done on sick patients and on healthy ones and you check for adverse reactions. So, it is just possible the children who died at AIIMS did not die due to the drugs, I cannot say for sure at this moment. The thing I can say though, is that the system of checks is well-designed