Intranasally applied human leukocyte interferon was recovered locally in 9 of 10 chimpanzees and 3 of 3 human volunteers tested. A 5- to 50-fold reduction in interferon was observed over 60 min.
Intranasally applied human leukocyte interferon was recovered locally in 9 of 10 chimpanzees and 3 of 3 human volunteers tested. A 5- to 50-fold reduction in interferon was observed over 60 min.