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9. Hepatitis A Incidence, 1987-1997 - Geographical Distribution

If you look at these two maps, the one in the upper corner and all these red and yellow areas, you can see that these were counties that had very high rates of infection during the decade from 87-97. And since immunization, if you look at that 2000 now, both of those have melted away. We have seen tremendous decreases in these high rate areas, and that will still go on as long as we immunize.