“…Materials and Methods Over 1,000 cases were investigated during the period July, 1956, to April, 1958 Most of these were patients admitted to adult and baby pneumonia wards; over 200 were adult cases seen in general practice (Blair et al, 1959). Serological tests of paired sera were made in most cases, but virus isolation was attempted with necropsy material from 32 cases and with throat swabs, garglings, or stools from a number of other cases in hospital, general practice, or seen by public health officers.…”