THE FATE OF VACCINIA VIRUS ON CULTIVATION IN VITRO WITH KUPFFER CELLS (RETICULO-ENDOTHELIAL CELLS)

The pathogenic activity of vaccinia virus is in large part suppressed when it is mixed with living Kupffer cells or clasmatocytes in the test-tube and injected intradermally. Vaccinia increases in quantity when introduced into cultures of Kupffer cells in vitro, and survives in immediate association with these elements. No antiviral principle is elaborated by them under such conditions.