10 indian states which were to use the measles vaccine produced by Human Biologicals Institute in its routine immunization programme have been asked by central govt to immediately stop the immunization. 4 infants in Tiruvallur district of Tamil Nadu died soon after the vaccine was administered to them at a primary health centre.According to health ministry records the vaccine was sent to Maharashtra,Rajasthan,Assam,Gujarat,UttarPradesh,Chhatisgarh,Jharkhand,MadhyaPradesh
and Bihar.The use of 45 lakh doses of measles vaccine made by HBI has been suspended till an inquiry into its efficacy and safety is completed.