Scientific Advisor to Prime Minister Atal Bihari Vajpayee Dr A P J Abdul Kalam, launched a new and indigenously made vaccine for Hepatitis D Revac B at Hyderabad on Thursday evening. The vaccine, developed by using the recombinant DNA technology, is being manufactured by Bharat Bhotech International Ltd, promoted by an NRI scientist Krishna M Ella, who returned from the USA in 1996.