Abstract
Conclusions
An antiviral substance which has the ability to neutralize the virus of herpes simplex has been found to be present in the blood early in the life of a few individuals. As age advances, though not necessarily because of maturation, more individuals acquire the antiviral property. A peak is reached in early adult life, after which apparently a decline sets in.
A group of sera from children whom we may assume carried no antiviral substances for poliomyelitic infection were shown likewise to be devoid of antiviral substances toward herpetic infection. Finally, herpes virus neutralizing properties have been discovered in the blood of monkeys which have reacted to poliomyelitis virus.
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