Poliomyelitis: epidemiology and control in Cornwall.

Abstract

Virus is an extremely small form of micro-organism, on an average about onehundredth the size of the average bacteria. It differs from bacteria in one very important point: it lives and propagates in the actual body cells, not on the surface of such cells, as do bacteria. In consequence, once established, it is extremely difficult to reach, and is affected little, if at all, by modern chemotherapy and antibiotics, which have altered