Lyme disease remains rare in Clackamas, Washington counties and became more rare in Multnomah county
Lyme disease counts by county (2014–2024)
There have been less than 20 cases per year in the region since 2020. The number of cases and resultant rates per 100,000 residents are generally decreasing, going from 1.1 to 0.44 cases per 100,000 from 2021 to 2024 in the region.
