vaccines to prevent poliomyelitis have been available for 48 years, paralytic disease continues to occur in some areas, as reported by Kohler et al. 1 elsewhere in this issue of the International Journal of Epidemiology. Let us hope that by the 50th anniversary of the development of the first successful polio-myelitis vaccine all transmission of wild-type polioviruses will have ceased. The Worl...

Ovarian cysts are commonly found on imaging done for other reasons. Proper triage will decrease unnecessary procedures and worry while obtaining the best survival benefit for those ultimately found to have cancer.

The ideas of cruelty, kindness, and unnecessary suffering play prominent roles in the growing debate over our treatment of animals. An index of how pervasive these ideas are, is that a philosopher who does not rely on them, or not all of them, or who argues in ways that give other ideas a place of prominence, might none the less be viewed as resting his case against, say, vivisection or factory...