Hello, Dr. My twins baby got BCG vaccinated and polio dose but hospital not given hepitis B vaccination because of low birth weight approx 2 kg. They born on 15 August 21 with premature low birth weight 2 kg..now can be given hepitis B vaccination. But some Dr. and hospitals are telling it should be given within 24 hrs of birth. Some government hospitals in the form itself written it should be within 24 hrs.. please advise it should be given now 15 days over and it should be effective.. please advise.. thanks with regards..