| field trials of ephemeral fever vaccines. | various bovine ephemeral fever (bef) vaccines were tested between 1982 and 1984 in 24 queensland herds; neutralising antibody responses were monitored and six of the herds were closely observed following natural challenge with ephemeral fever. a vaccine regime of two consecutive vaccinations with attenuated virus combined with the adjuvant quil a provided excellent protection against bef for at least 12 months, whereas one vaccination with the quil a vaccine or two vaccinations with vaccine cont ... | 1995 | 8545949 |