Transmission through Milk of Antibodies against the Friend Virus in Mice

THE immunoelectroadsorption method 1,2 has in the past few years been used to detect the appearance of antibodies in mice infected with Friend virus. Using this method, we decided to investigate whether antibodies produced by pregnant mice could be passed to their progeny and, if so, which route was used—placental or milk. The possibility of the transmission of the virus to the litter was also investigated.