The author draws attention to the need for accurate epidemiological information so that control programmes may be properly orientated and he emphasizes that we are still at a loss in this respect in the case of trypanosomiasis, as we still lack methods to recognize, among the assemblage of natural trypanosome ...

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Estimates of the genetic damage from radiation exposures of human populations are needed in order to set reasonable limits for future exposures. In addition to the three rads per generation received by the gonads from natural sources, a similar amount is currently contributed by medical radiology and a further five ...

A great deal of folklore, superstition and emotional reaction is attached to the common cold, but established objective information is quite limited. The evidence concerning etiology, epidemiology, physiology, prevention and treatment of the common cold is briefly summarized and critically evaluated. There is disappointing lack of real progress in any ...