The Journal of Experimental Medicine, Vol 73, 327-333,
Copyright, 1941, by The Rockefeller Institute for Medical Research New York
NEUTRALIZATION OF INFLUENZA A VIRUS BY HUMAN SERUM
Frank L. Horsfall Jr. M.D.1 and
Edwin H. Lennette M.D.1
1 From the Laboratories of the International Health Division of The Rockefeller Foundation, New York
A linear relationship exists between the quantity of human serum used and the quantity of influenza A virus neutralized. By means of this relationship it is possible to determine the maximum quantity of virus which a given human serum can neutralize. This quantity, the neutralizing capacity, is a fixed value and, unlike the serum dilution end point, is independent of the amount of virus used in the neutralization test.
Submitted on November 14, 1940