There has been one recorded case in King County, which is the area around Seattle.
So far this year, there has been one case of measles in B.C. It was acquired by an adult traveller returning from the Philippines.
The B.C. Centre for Disease Control is warning residents about a measles outbreak in the state of Washington.More news: OH legislators react to short-term deal to reopen federal government
Washington's state Govoner declared a state of emergency following a measles outbreak unfolding in Clark County on January 25.
This is the first confirmed case of measles in Oregon.
The county released a list of public places where infected children visited, which included several schools and churches, the Portland, Oregon airport and a Costco. The proportion of children receiving no vaccine doses by 2 years old rose from 0.9% among those born in 2011 to 1.3% among those born in 2015, the CDC reported in October.
Last week, a person infected with measles attended a Portland Trail Blazers home game in OR amid the outbreak. While it is expected most will not be affected by the outbreak, those who have not been vaccinated against the disease, including infants less than a year old, are at risk. "Fortunately, the measles vaccine is very effective".More news: New Zealand vs India
Clark County, which includes the Portland bedroom community of Vancouver, Washington, has a measles vaccination rate of 78 percent, well below the 92 to 94 percent rate required for so-called "herd immunity", said Marissa Armstrong, the department's spokeswoman. The measles vaccine consists of two shots, one given by age 2 and the second usually between ages 4 and 6.
Measles is highly infectious and spreads through the air by coughing and sneezing, as well as respiratory secretions.
Measles can lead to serious complications including pneumonia but the vaccine is up to 97 percent effective and protects recipients for life.
To avoid infecting others, Clark County Public Health urges anyone who believes they may have been exposed to measles or are experiencing symptoms of the disease to call a health-care provider, to discuss being evaluated before going to a doctor.More news: Transfer fee owed for missing Cardiff City striker Emiliano Sala