New research explains repeated infection by some viruses

New research conducted at the Oregon Health & Science University Vaccine and Gene Therapy Institute explains how a virus that has already infected up to 80 percent of the American population can repeatedly re-infect individuals despite the presence of a strong and long-lasting immune response. The research involves cytomegalovirus (CMV), which infects 50 percent to 80 percent of the U.S. population before age 40. Details of the new findings are printed in this week's online edition of the journal Science.

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