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reated many new ones " The#two main findings. Mr. O'Connor .said, were that di gamma globulin provides marked :wolf lion o! a temporary nature | a .tinsi paralytic polio and ‘2' , ii may modify tlie severity of, polio during the late stages of the incubation period of the disease ; even though it may not prevent! the disease completely if given after the infection lias taken place I.imitations C ited Mr O'Connor cited three im . portant limitations to the use of gamma globulin. 1— It gives only temporary pro tection. Thus the search for a permanent vaccine must continue 2— OG is m very short supply Techniques for increasing the
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