You will be given a definition of a task first, then some input of the task.
Generate an explanation for the given claim using the provided supporting material from the paragraph. Please consider the following points while generating an output. 1) The claim will always have supporting proof in the paragraph, and the paragraph will have a clear point of view supporting the claim. 2) There can be instances where direct correlation to the claim is not available. Make use of the sentences in the paragraph to provide a corresponding output supporting the claim. 3) The explanation should be at least one and at most twelve sentences long.

Paragraph: News outlets report the Centers for Disease Control and Prevention says it was notified on Oct. 1 that a flight attendant had a confirmed case. The Mecklenburg County Health Department says it contacted 18 Charlotte-area passengers who were on the American Airlines flight Sept. 21 from San Francisco to Charlotte. Spokeswoman Rebecca Carter says those passengers have since been vaccinated. American Airlines released a statement saying it's in close contact with the CDC and public health officials and will coordinate with them on any required health and safety related measures. Hepatitis A is a liver disease caused by contaminated food or water. Claim: Flight attendant may have exposed passengers to Hepatitis A.
Output:
Health officials in North Carolina say more than a dozen people may have been exposed to hepatitis A on a recent flight.