About 2.53 million children aged between six and 11 months will be fed blue coloured vitamin 'A' capsules while 19.5 million children aged between 12 and 59 months will be given red coloured high-power capsules. Vitamin A strengthens children’s immune system, reduce frequency of diarrhea and measles, and prevent night blindness. Bangladesh has cut night blindness to 0.04 percent in recent years from 3.76 percent in 1982 through this campaign.