(Portland, OR)  --  Oregon is experiencing an increase in COVID-19 breakthrough cases.  Those are people who were vaccinated but still develop COVID-19.  During the first two weeks of August, there were nearly three-thousand breakthrough cases.  They make up 14-percent of all cases.  Officials say 86-percent of cases in Oregon are in unvaccinated people.  Only six-percent of the breakthrough patients go to the hospital, and less than one-percent of them have died.