Andrew Noymer, an associate profession of population, health and disease prevention at UCI, said there’s ways to open, but safely. “I’m not worried about the transmission of the virus through water,” he said, especially because many pools are outdoors in Southern California. But what if two people are swimming side-by-side and they are both breathing heavily? “I can’t rule out transmission like that,” he said. To be on the safe side, pools could open only every other lane, he said. He equated swimming, and the need for physical exercise, to jogging outdoors, which can be done safely if not around others.