1. There were six children in the family: Andrewes;fig. I1;Lancet; everyone had poliomyelitis virus in the stools. The stools of forty-three contacts of these six children were examined. Nine of these contacts were adults: 292,1943
2. There were six children in the family: Andrewes;fig. I1;Ibid,1930
3. Baker, J. A. (1942). Science, 96, 475.
4. Bedson, S. P. (1935). Lancet, 2, 1277.
5. Brit. J. exvp. Path., 17, 109.