The Oregon Health Authority promised equity in vaccine distribution but people in wealthier ZIP codes are far more likely to have been vaccinated than in poorer areas.
Cases of the highly-infectious British variant are increasing but patients sickened by variants that first emerged in California outnumber all others.
Health experts said regulators have to strike a balance between addressing small but serious risks while encouraging millions to get vaccinated.
The decision follows a federal announcement that six cases of blood clots had emerged in women between 18 and 48 who received the vaccine.
As Oregon prepares to open the vaccine floodgates to everyone 16 and older April 19, health officials face a proportion of rural residents who don't want a jab.
The state announced Thursday that Oregon that none of the cases involved a variant and that most of the people who were fully vaccinated experienced no symptoms.
The Oregon Health Authority on Wednesday reported 481 new coronavirus cases and seven deaths, as state officials released a tally of vaccine doses that have been discarded since inoculations began in December.
In Multnomah County, homeless service providers are helping health officials identify and address barriers to vaccine access.