Current evidence weighs against the idea that cancer may spread between animals and man. In studies of animal tumor viruses, horizontal spread of virus from animal to animal is only rarely seen under natural conditions, and no traces of transmission to man have yet been found (1). Epidemiologic studies are likewise mostly negative. Cancer mortality among veterinarians seems no greater than in the general population (2), and surveys designed to estimate frequency of cancer among pet animals in households containing cases of human cancer (3), or vice versa, frequency of human cancer in households containing cases of pet cancer (4),
Sick Pets and Human Leukemia. Ann Intern Med. 1973;78:605. doi: 10.7326/0003-4819-78-4-605
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Published: Ann Intern Med. 1973;78(4):605.
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