For vitamin A for children, which is a preventive measure as well as a treatment measure, the product cost is around 5¢ per child per year, so that part is extremely cost-effective. The delivery cost ranges according to the conditions. The more distant the population, the higher the cost, but it ranges from 25¢ to 50¢ and sometimes up to about $1 per child per year. It's very cost-effective all around and is usually integrated with other services to get cost efficiencies.
On June 7th, 2016. See this statement in context.