AUBURN -- Placer County officials report three people infected with measles went to an Auburn fitness club.
According to the Centers for Disease Control and Prevention, measles was eliminated in the U.S. in 2000 but the illness has been resurrected recently with more than 310 cases reported nationwide since January.
It's a problem public health officials say has surged with the anti-vaccine movement.
The latest local cases were reported at the Auburn Racquet and Fitness Club. Epidemiologists with Placer County Public Health say a family went to the fitness club without knowing they were ill.
Three members of that family now have confirmed cases of the measles after visiting a sick relative.
"This person was in the hospital and these family members visited not knowing that he was ... that he had measles," said Placer County Public Health Program Manager Michael Romero.
Despite the fact that measles can be fatal for those who might develop rare, life-threatening complications, the health department says there's actually little to worry about if you weren't at the club Monday, March 18 between 7 and 9 p.m.
Also, officials say don't think something's wrong if you don't see a multi-day club clean-up.
"If someone has measles and they go into a room and they just breathe, cough or sneeze, measles will live in that room for an hour and after that, that's it," Romero told FOX40. "At this point, there's no need for any extensive sanitation for that location."
One manager of the Auburn Racquet and Fitness Club wanted to speak out about the situation that they've posted notices about around the facility and on their social media pages.
"We are working together with the Placer County Health Department to make sure everyone is safe because we love our people. We really, really do love our people and I especially love our people. And I want them to know that they will be taken care of and we are doing everything we can."
There have been seven confirmed measles cases in California as of March 22.
If you were at the club between 7 and 9 p.m. March 18 and are not feeling well, experts say call your primary care doctor first with your concerns before just stopping by their office. That way, if you do indeed have the measles, you don't expand the exposure.
You should also call Placer County Public Health at 530-889-7183.
At this time, investigators do not believe the infected family visited the club on any other days or times other than last Monday and say no schools or any other locations are involved in the exposure.