In hopeful sign for the US, flu vaccine shows strong protection against hospitalization in South America, CDC report shows | CNN Early data from South America shows that the flu vaccine has cut the risk of hospitalization in half this year, a hopeful sign that the vaccine will provide a similar level of protection in the United States as the country heads into its own respiratory virus season. Deidre McPhillips CNN

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This year, mid-season flu vaccine data from five countries – Argentina, Brazil, Chile, Paraguay and Uruguay – shows that vaccination has reduced the risk of hospitalization by 52%, according to a report published Friday by the US Centers for Disease Control and Prevention.

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