It is estimated that the child vaccination increased worldwide from 20% in 1982(?) to 80% in 1990 because of the child survival revolution.Maggie Black, Children First: The Story of UNICEF, Past and Present (New York: Oxford University Press, 1996), 33; see also UNICEF, The State of the World’s Children 1986 (New York: Oxford University Press, 1985), 5.
