Recent dramatic decreases in COVID-19 cases statewide and in the Gorge has no single cause, said Mimi McDonell, health officer with North Central Public Health (CNPH). “We don’t really know, it's a lot of things,” she told the Wasco County Board of Commissioners March 3. She said the current theory is that the decline was the result of a combination of factors. “The lack of holidays, after the surge in late fall, that was huge,” she said. And vaccine availability, especially for long term care facilities and health workers, was an important factor. “There were a lot of outbreaks there, and those are not happening anymore.”

She added that there is discussion regarding whether or not there may be a seasonality to the COVID virus as well, “but we don’t know yet.” Another possible but important factor, she added, was that more people may have already had the virus than was thought. “It may be that more people have had it than we knew, and are immune,” she said, noting that testing was seriously limited early in the pandemic.