Article: Use of northern hemisphere influenza vaccines by travelers to the southern hemisphere.(Clinical report)

The influenza season in temperate climates extends from October through March in the northern hemisphere and from April through September in the southern hemisphere (1-3). Recent studies indicate that influenza viruses can circulate throughout the year in the tropics and that influenza is the most frequently acquired vaccine-preventable disease among those traveling to tropical and subtropical countries (2-5). Influenza outbreaks have been reported among persons who travel from the northern hemisphere to the southern hemisphere and among persons from the northern hemisphere on group tours (4-7). To reduce the risk for influenza during travel, the Advisory Committee on ...

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