Big fleas have little fleas
Upon their backs to bite 'em
And little fleas have lesser fleas
And so ad infinitum.
Close to the fleas' infinitum are the phages which Dr. Felix d'Hrelle, professor of protobiology at Yale, described last week to the Society of American Bacteriologists at Baltimore. Phages behave as though they bite germs.
In 1918 Dr. d'Hrelle described the existence of something, invisible to microscopes, which seemed to feed on and alter the existence of various types of disease bacteria. He called this something...
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