BAKER CITY â A recent change to Oregonâs COVID-19 risk level system should allow Baker County to remain at the lowest level, with the least severe restrictions, through most of April even though the countyâs case rate has nearly tripled in the past two weeks. Oregonâs four-tier system imposes restrictions on businesses and events based on the number of new virus cases and the test positivity rate in their county. Risk levels are subject to change every two weeks, based on statistics from the previous two-week measuring period. Baker County has been in the lowest of the risk levels since March 26.