Multiple COVID-19 vaccine trials are in final stages, but virus experts think it may take some time before a vaccine is widely available to the general public. Experts at Portland State University told KATU News the Moderna vaccine, as well as the Pfizer and Oxford trials, are all front runners. What’s still unknown is how effective the will vaccines be, and how long will it take to distribute. Caption: Health experts don’t anticipate COVID-19 vaccine for general public until summer 2021.