Vaccine

Carlos de la Rosa, 53, chief conservation and education officer with the Catalina Island Conservancy, holds a test dart that will be used to inject the contraceptive vaccine porcine zona pellucida into female bison. He is one of three biologists that will be overseeing the process.
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( Genaro Molina / Los Angels Times / November 18, 2009 )

Carlos de la Rosa, 53, chief conservation and education officer with the Catalina Island Conservancy, holds a test dart that will be used to inject the contraceptive vaccine porcine zona pellucida into female bison. He is one of three biologists that will be overseeing the process.

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