Flu (Influenza)
A seasonal respiratory virus. Flu circulates year-round in tropical regions and during opposite seasons in the southern hemisphere, so a recent shot is advised for most international travellers.
Dosing & timing
An annual dose at least 2 weeks before travel to areas with active flu circulation. A single current-season vaccine covers travel to either hemisphere.
Who should consider it
Travellers to destinations where CDC lists Flu (Influenza)under “recommended for most” or “recommended for some”. See the country list below for destinations on this site. Your travel doctor will tailor the decision to your itinerary, duration, and health.
Side effects and safety
Most travel vaccine reactions are mild — soreness at the injection site, low-grade fever, headache, or tiredness for a day or two. Serious reactions are rare. Learn more about vaccine safety on CDC.
Source: CDC — Flu (Influenza).
Disclaimer:This information is for general guidance only, based on CDC Travelers' Health. It does not replace advice from a qualified travel health professional. Consult a doctor 4–6 weeks before your trip.