A third person in Multnomah County has measles as part of a small outbreak that started last month. The Läns Health Department reported the public Friday of the newest case.
A child in Clark County is also suspected of having contrasted measles from exposure to one of the three Multnomah County cases.
At the end of June, anyone who traveled outside the United States visited a Portland emergency room where it was confirmed that the person had measles.
Public health officials in the county then reported someone who could have come into contact with the infected person to offer vaccines and ask them to stay away from others. About 500 people were notified, but only 40 were thought to be in danger.
Of the 40, most are now outside the window where they should show symptoms if they are infected. But eight people who are not immunized are still possible carriers.
The original carrier had a vaccination record. Vaccines are most effective when a large majority of people in the area are also vaccinated. American outbreaks of the virus often occur in people traveling to places with lower vaccination levels.
The second and third persons who caught measles were not vaccinated. The other person spent time with the first person during the time that person was infectious.
When they tested positive for measles, they agreed to stay home to avoid contagious others. The other person, however, had been in daily contact with the last person to test positive.
Public health officials said the child in Clark County probably got measles from the first person. That person had spent considerable time on a Gresham childcare.
Clark County officials then warned people who could have been in three sales outlets for a time when they might have been exposed to the virus. On Friday, officials appointed fourth place. The four places are:
- Between 2 and 5 p.m. June 27, JC Penney, 19005 S.E. Mill Plain Blvd. in Vancouver.
- Between noon and 3 pm June 28 at Ross Dress for Less, 4708 N.E. Thurston Way in Vancouver.
- Between noon and 3 pm June 28 at Svitoch, 4804 N.E. Thurston Way in Vancouver.
The virus can spread through the air when someone sneezes or coughs and can remain in the air after an infected person leaves, the health department said. Symptoms include cough, fever, runny nose and rash that usually occurs first on the head and spreads to the rest of the body.
The virus can lead to ear and lung infections, diarrhea and possibly cardiac failure if not treated.
If you think you are infected, contact a doctor or emergency department before you visit to avoid exposing people to the waiting room for the virus. Questions about the virus can be referred to local county health departments.
- Multnomah County (503-988-3406)
- Clackamas County (503-655-8411)
- Washington County (503-846-3594)  Clark County (360-397-8182)
] – Molly Harbarger