¶ At the height of the Salk crisis last June, Detroit's Parke, Davis & Co.
stopped producing the vaccine, has not shipped a drop since. Last week Parke, Davis gave the reason: it is experimenting with ultraviolet rays in processing the vaccine. This could give greater assurance of safety. Also, ultraviolet might make it possible to produce a more effective vaccine, using less formaldehydewhich sometimes kills the virus so thoroughly as to make the vaccine ineffective.
¶ It is nonsense, said the A.M.A. Journal, to advise mothers to cut out all sweets (including fruits and other foods containing natural sugar) from the diet...