The variants latch onto cells more tightly, invade them more efficiently, and elude many of the antibodies induced by previous infections and vaccines.
In the most recent report from April 1 through June 30 a high of 151 cases of COVID-19 were reported over a 14 day period, resulting in a case rate of 58 per 100,000 residents.
Yakima Health District officials and officials from World Health Organization say they're concerned about another wave of cases that could put people in the hospital and kill others.