Several possible measles cases are under investigation across California.
According to NBC affiliate, KCRA, health officials are investigating three possible cases of the measles in one family in Placer County.
As of Tuesday, those cases were not confirmed, but the patients were showing symptoms of the virus. The Placer County Public Health Department says it is waiting for test results.
According to KCRA, the Placer County measles are connected to recently reported confirmed cases of the measles in Butte County. Health officials confirmed over the weekend that two adults who were unvaccinated contracted the virus. The Butte County cases were connected to another measles case in Shasta County.
The person who was infected in Shasta County traveled to places in Shasta, Butte, and Tehama counties, potentially spreading the virus.
Health officials in Santa Clara are also warning people about possible measles exposure.
NBC Bay Area reports an international traveler who was visiting the Bay Area had the virus. The traveler is believed to have visited 20 places in the South Bay region from March 16 to March 23.
The news comes as state lawmakers could toughen California’s immunization law.
Senate Bill 276 would give more power to state public health officials in determining which children should not be vaccinated before attending school.