Definition: In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.
Input: Endogenous interferon (IFN) made by the newborn piglet in response to enteric coronavirus TGEV (transmissible gastroenteritis virus) infection was identified as leukocytic IFN (IFN-Qt). Indeed, the antiviral activity found in the serum and in the urine of infected piglets displayed the same main biological and antigenic properties as the IFN induced in influenza-infected pig leukocytes. It is therefore concluded that most, if not all, circulating IFN activity must be derived from lymphoid cells. Moreover, it was shown that a high degree of antigenic homology exists between porcine and human IFN-ct: antibodies to HuIFN-~ could efficiently neutralize PorIFN-~, and they were used for its purification by immunoaffinity.

Paris 1986 1986, 137 E, 171-180 BIOLOGICAL AND ANTIGENIC RELATIONSHIPS BETWEEN VIRUS-INDUCED PORCINE AND HUMAN INTERFERONS