The race for a coronavirus vaccine to help end the pandemic has consumed the scientific community and created an escalating demand for an essential resource: monkeys. Before drug companies call on human volunteers, monkeys are used in preclinical trials to test a vaccine’s safety and effectiveness. But with more than 100 vaccines in development around the world, there aren’t enough monkeys to go around. “There is a shortage,” said Dr. Skip Bohm, associate director and chief veterinary medical officer of the Tulane National Primate Research Center.