Where Nipah once moved from bats to pigs to humans, in Kerala it jumped from human to human.
<a href="http://www.gayathrivaidyanathan.com" rel="nofollow">Gayathri Vaidyanathan</a> is a reporter with <a href="http://www.eenews.net" rel="nofollow">E&E's EnergyWire</a> in Washington, DC.
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