<prompt> Single massive dose of vitamin A for preventing the deficiency in preschool children between the age of 1-6 years for every 6 months is:2,000 IU20,000 IU2,00,000 IU20,00,000 IU  <response>: Prevention and control of vitamin A deficiency in children It is estimated that large number of children suffer from sub-clinical deficiency of vitamin A. Under the programme, doses of vitamin A are given to all children under 5 years of age. The first dose 1 lakh units is given at nine months of age along with measles vaccination. The second dose 2 lakh units is given after 9 months. Subsequent doses 2 lakh units each are given at six months intervals upto 5 years of age. All cases of severe malnutrition to be given one additional dose of vitamin A. 