As measles outbreak sickens more than a dozen children in Ohio, local health officials seek help from CDC

(CNN)A growing measles outbreak in Columbus, Ohio, has sickened more than a dozen unvaccinated children and hospitalized nine of them, and local public health officials are seeking assistance from the US Centers for Disease Control and Prevention.

     "We asked the CDC for assistance if they will be sending two epidemiologists at the end of the month to assist with our local investigation," Kelli Newman, a spokesperson for Columbus Public Health, told CNN in an email Thursday.

       The CDC confirmed Thursday that it is aware of the cases and is "deploying a small team to Ohio to assist on the ground with the investigation."

       They are vaccinated, and helping any community members who may have been exposed understand the signs and symptoms of measly infection," CDC spokesperson Kristen woodland said in an email to CNN. "Anyone who may have been exposed should follow up with their healthcare provider."

      When the measly outbreak was first reported last week, only four confirmed cases had been identified in one child-care facility, which temporarily closed -- but the number of cases and facilities involved has grown.

        As of Friday morning, Columbus Public Health officials updated their investigation to include 19 confirmed cases, and more suspected, at 10 daycare centers and two schools.

      All cases are in unvaccinated children, and all but one are less than 4 years old. One child is 6 years old," Newman said.

       Health officials with Columbus Public Health and Franklin County Public Health have been investigating these cases and tracing any contacts who may have been exposed to the measles virus.

       Officials at Columbus Public Health are encouraging parents to make sure their children are up-to- date on their immunizations, including the measles, mumps and rubella vaccine, known as the MMR vaccine.

         Experts recommend that children receive the vaccine in two doses: a first between 12 months and 15 months of age, and a second between 4 and 6 years old. One dose is about 93% effective at preventing measles if you come into contact with the virus. Two doses are about 97% effective.

         "We are working diligently with the cases to identify any potential exposures and to notify people who were exposed," Columbus Public Health Commissioner Dr. Mysheika Roberts said in a news release last week. "The most important thing you can do to protect against measles is to get vaccinated with the measles-mumps-rubella (MMR) vaccine, which is safe and highly effective."

        About 90% of unvaccinated people who are exposed to measles will become infected, according to Columbus Public Health, and about 1 in 5 people in the US who get measles will be hospitalized.

        However, the CDC says that more than 90% of children in the US have been vaccinated against measles, mumps and rubella by age 2.

         Measles is a highly contagious disease that can spread through the air when an infected person coughs or sneezes, or if someone comes into direct contact with or shares germs by touching the same objects or surfaces. Measles symptoms may include fever, cough, runny nose, watery eyes and a rash of red spots. In rare cases, it may lead to pneumonia, encephalitis or death.