 Well, a 40-year-old elephant at the Houston Zoo is the first of her kind to get a vaccine against the elephant herpes virus. This is a big deal because elephants have co-evolved with the virus for millions of years, and it kills orphan elephants that didn't get antibodies from their mothers. Houston Zoo's Dr. Christine Moulter says this could just be the start. She says they've been in communication with range country veterinarians in Asia.