Antiviral medications used to prevent H1N1 flu should be considered for U.S. travelers going to Mexico who are at high risk of severe illness from influenza. Those at risk would include individuals with chronic medical conditions, individuals aged 65 or older, children younger than 5 years old, and pregnant women. Consult your physician about the indications for using influenza antiviral medications.
Visit your health care provider, who will determine the necessary vaccines you will need to take prior to your trip to Mexico.
If you are traveling to Mexico for medical reasons, you should share your travel plans with your local health care provider.
Be sure your routine vaccinations are up-to-date. If you are not sure what routine vaccines include, ask your local health care provider.
Identify the health-care resources available in the area(s) you will be visiting.
Identify your home Embassy or Consulate in the area you will be staying. Take notice that U.S. embassies, consulates or military facilities do not have the legal authority to evacuate or issue medications, vaccines or any medical care to U.S. citizens abroad.
Swine flu is not always contagious, however having the H1N1 virus makes patients susceptible to other bacterial infections and as the immune system is lower, minor illnesses can be fatal in H1N1 carriers. If you experience any of the following symptoms, or feel unwell and have possibly been exposed to H1N1, seek immediate medical care. 
