PORTLAND, Ore. – Of more than 700,000 people in Oregon who have been fully vaccinated against COVID-19, 168 still tested positive for the virus and three died.
The Oregon Health Authority says that while the vaccines are all highly effective, no vaccine is 100% effective.
Vaccine breakthrough cases are instances in which a person received a positive COVID-19 test result at least 14 days after the final dose of any COVID-19 vaccine series.
Many of the vaccinated people who tested positive for COVID-19 experienced asymptomatic infection.
None of the vaccine breakthrough cases were associated with a COVID-19 variant.
Here’s more from the Oregon Health Authority:
Oregon Health Authority has identified 168 COVID-19 vaccine breakthrough cases—when vaccinated individuals test positive for the virus—through April 2, including three deaths.
OHA public health officials say it’s a reminder that while the Pfizer, Moderna and Johnson & Johnson COVID-19 vaccines are all highly effective at preventing severe COVID-19 illness and death, no vaccine is 100% effective, and vaccine breakthrough cases will occur.
These cases have been reported in 25 counties and all health care preparedness regions (Region 1: 76; Region 2: 29; Region 3: 27; Region 5: 9; Region 6: 4; Region 7: 17; Region 9: 6). OHA is not reporting the regions in which the deaths took place.
Vaccine breakthrough cases are defined as instances in which an individual received a positive COVID-19 test result at least 14 days after the final dose of any COVID-19 vaccine series. Vaccine breakthrough cases can be prevented by basic public health interventions, such as masking, physical distancing and avoiding social gatherings.
The number of vaccine breakthrough cases identified in Oregon represents a very small proportion of the more than 700,000 people in Oregon who have been fully vaccinated against COVID-19. Many of the vaccine breakthrough cases identified experienced asymptomatic infection and were tested for other reasons. Eleven percent (n=19) of the vaccine breakthrough cases were hospitalized within the 30 days following their positive test, and most occurred in people older than 65 or with underlying health conditions. The three deaths represent fewer than 2% of the vaccine breakthrough cases, and none of the vaccine breakthrough cases were associated with a COVID-19 variant.
State and local epidemiologists are continuing to track and investigate vaccine breakthrough cases and are working closely with the Centers for Disease Control and Prevention to collect information that may provide insight into characteristics associated with vaccine breakthrough.