(1) Injections
Intrdermal injections will be carried out a total of 5 times, i.e., DTH-1 (delayed-type hypersensitivity test-1, 0.1 ml), AFTV inoculation-1 (0.2 ml x 5 sites), -2, -3, and finally DTH-2 (delayed-type hypersensitivity test-2).
(2) Schedule