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.
Q: Paragraph: KDVR-TV reported Monday that three of the cases were diagnosed within the past three weeks. Denver Public Health executive director Dr. Bill Burman says his agency will set up vaccine clinics almost every day in day shelters, syringe access programs, Civic Center Park and other places where people at risk of contracting the disease are found. Hepatitis A can be spread through sharing of drugs and equipment, fecal-oral contamination or intimate contact with a person who has the disease. Health officials say the disease can be prevented with a vaccine that's been a part of standard childhood immunizations for more than a decade. ___ Information from: KDVR-TV, http://www.kdvr.com Claim: 4 hepatitis A cases found in Denver; vaccinations stepped up.
A:
Denver public health officials say four homeless people have been diagnosed with hepatitis A this year, so the city is stepping up free vaccinations.