Four people in Oregon who were fully vaccinated recently tested positive for COVID-19, health officials announced Friday.
Two of the “breakthrough cases” have been reported in Yamhill County, and the others are in Lane County, Oregon Health Authority said in a statement
The four individuals contracted the virus 14 days after receiving the second dose of the vaccine, the OHA said, adding that their symptoms ranged from none to mild.
Health officials say less severe cases of COVID-19 have been reported after inoculation shows the vaccine is still effective.
“Clinical trials with both vaccines currently in use include breakthrough cases. In those cases, although the participants received COVID, the vaccines reduced the severity of the disease, ”says the OHA, which is investigating the origins of the cases.
Results of genomic sequencing samples taken from the four patients are expected next week, officials said.
Officials added that they expect to see more breakthrough cases and encourage the public to continue wearing face masks and follow the guidelines of the Centers for Disease Control and Prevention.