Word: viral
(lookup in dictionary)
(lookup stats)
Dates: during 1960-1969
Sort By: most recent first
(reverse)
Porter also finds that the growth of liver tumors he has observed does not depend on virus. "The growth may have been induced by a viral agent," he concluded, "but I don't think it's likely." Other forms of cancer, he added, may be virus-dependent...
...commonest victims of acute respiratory disease-ARD in medical jargon-are children, the PHS's vaccine program will be tailored for them. The first vaccines will be made from ten viruses-respiratory syncytial virus (the most important), three types of parainfluenza virus, six of adenovirus-and one non-viral microbe, the "Eaton agent" (TIME, Nov. 10). Together, these microbes are estimated to cause 60% of ARD cases judged to be severe enough to send most children into hospitals...
...difficulty in checking a viral infection is to find a chemical that behaves differently in normal and diseased cells, or to find a part of the body in which the chemical acts against the virus without damaging cells. Such a part of the body is the eye. Dr. Kaufman reasoned that since the cornea, a kind of plastic window, has no blood supply, its cells might be more receptive to the effects of the drug. Kaufman's hunch, tested in rabbits, proved right in humans...
...Alexander Langmuir, chief epidemiologist for the U.S. Public Health Service, testified that in the ten months ending October 1960, the national rate for all viral hepatitis was 26 per 100,000. But among Weiner's 329 patients for the period, 40 were diagnosed as having hepatitis, "for an astronomical rate of 12,000 per 100,000." Expert witnesses agreed that this could not have been by chance...
Since then, "guided and directed mutation with precisely predictable features" has produced bacteria that mutate after infection with viruses. Formerly harmless strains of diphtheria bacilli will, after viral infection, secrete the poison of virulent diphtheria. Because the bacterial lines breed true, said Dr. Horsfall, both these are cases of "infective heredity" induced by environmental factors...