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1 —It gives only temporary pro tection. Thus, the search for a permanent vaccine must continue. 2— OG is in very short supply. Techniques for increasing the supply for reasonable use must be developed. 3- Gamma globulin research is incomplete. It must still be de termined. for e ample, if GG will permit the mild, inapparent form of polio infection that leads to an active long-lasting immunity. Large sums of March of Dames money must be invested before solutions to the above problems are found, Mr. O'Connor pointed out. May "Smother" Epidemics Our scientists insist that all we can reasonably hope for at this point," he said, "is that gamma globulin may be used in attempt ing to ‘smother' polio epidemics in hard-hit areas. The final ans wer will still have to be a safe and effective vaccine that will provide relatively long-lasting im munity. Efforts to produce such a vaccine for widespread human ’ are being hopefully pursued."
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