This much is certain after Permian Regional Medical Center’s initial round of COVID immunization— most of the frontline healthcare workers and first responders vaccinated experienced only a slight reaction of a sore arm where the shot was administered. That’s common with any immunization, PRMC CEO Donny Booth said. Around 85 percent of those vaccinated incurred arm pain at the injection site, according to Booth. A smaller percentage—around 15 percent—experienced reactions of body aches, chills and low-grade temperatures, the PRMC CEO added.