BILLINGS, Mont. - RiverStone Health is reporting they have been notified of 13 residents who died of COVID-19 over the winter. âI am saddened to learn that 13 more of our neighbors passed away and that 13 more families have been grieving pandemic victims,â said John Felton, Yellowstone County health officer and president and CEO of RiverStone Health. âWith vaccinations now widely available and continued precautions of handwashing, distancing and masking, I am hopeful that we can prevent serious illness and death going forward.â The cases were identified by officials with the Montana Department of Public Health and Human Services in Helena through death certificate review that showed COVID-19 was a cause of death.