Explanation:

• It is India’s first indigenously developed vaccine for rotavirus infections. It has been developed by the Hyderabad-based Bharat Biotech Limited.
• It was introduced in 2016 in phased manner, beginning with 4 states initially. At present, Rotavirus vaccine is now available in 28 States/UTs.
• It was included in Universal Immunization Programme (UIP) based on recommendation of expert committee National Technical Advisory Group on Immunization (NTAGI).
• In January 2018, World Health Organisation (WHO) had prequalified Rotavac vaccine i.e. it can be sold internationally to several countries in Africa and South America.