Animal Vaccination
Several animal vaccines have been made to protect against RVF infection. The first one to be developed was a live vaccine. When administered to mice, the results were promising; this vaccine provided immunity for three years. However, a problem was encountered: administration to pregnant ewes on many occasions led to abortion. Since then, attenuated vaccines have been developed. Although they are protective and do not cause adverse effects, these results are only achieved after multiple inoculations, which may prove problematic, especially in areas where RVF is endemic.
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Famous quotes containing the word animal:
“Man is the only animal that laughs or weeps; for he is the only animal that is struck with the difference between what things are, and what they ought to be. We weep at what thwarts or exceeds our desires in serious matters; we laugh at what only disappoints our expectations in trifles.”
—William Hazlitt (1778–1830)