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Young people are usually less likely to become seriously ill with flu, but this season looks like an exception to that rule. Blame the H1N1 strain. Even though the flu vaccine is less than perfect, getting a shot each year can make the illness less severe, doctors say.
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Most people who are infected with West Nile virus never get sick. But some of those who do can wind up in the hospital, or suffer permanent disability. A Texas outbreak in 2012 may have made West Nile one of the more costly diseases in the state that year.