Detailed Instructions: 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.
Problem:Paragraph: Glaxo said on Wednesday the data, from an extended follow-up study, showed the longest duration of sustained neutralizing antibody levels reported against both virus types HPV 16 and 18 with a cervical cancer vaccine to date. Experts believe that neutralizing antibodies so-called because they have the ability to neutralize cancer-causing virus types and prevent them from infecting cells in the cervix are essential for cervical cancer protection. Claim: Glaxo says cervical cancer vaccine works for longer.
Solution:
GlaxoSmithKline said on Wednesday new data showed its Cervarix vaccine generated sustained, high levels of neutralizing antibodies against the two most common cervical cancer-causing virus types for 6.4 years.