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In 1931, Dr. Joseph Lennox Pawan of Trinidad in the West Indies, a Government Bacteriologist, found Negri bodies in the brain of a bat with unusual habits. In 1932, Dr. Pawan discovered that infected vampire bats could transmit rabies to humans and other animals. In 1934, the Trinidad and Tobago Government began a program of eradicating vampire bats, while encouraging the screening off of livestock buildings and offering free vaccination programs for exposed livestock.
Joseph Lennox Pawan