Sir.—The letter from Dr Shaw in the Journal (131:816, 1977) tickled my memory concerning some correspondence on the first through fifth diseases in the 1960s.1,2 Not to be outdone, one enterprising writer even discussed the "sixth disease."3
SZALAY GC. First Through Sixth Diseases-Reply. Am J Dis Child. 1978;132(4):433. doi:10.1001/archpedi.1978.02120290105030
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