Here's some great advice from Grace DaSilva-Hill, a homeopathic practitioner:
The best way to keep well is to not connect with the type of fear and alarm that we sometimes hear in the news; eat well with plenty of fresh fruits and vegetables, drink a lot of good quality water, and supplement with good quality Vitamin C if you feel you need it; many people are taking the herb Astragalus which is what I normally recommend in the winter months to boost the immune system.
Several of my patients (adults and children) have now had swine flu, and I am pleased to say that they have all recovered with the use of homeopathic remedies.
Another way to keep well is to take your constitutional homeopathic remedy; I advise that people take this at least once a year to strengthen the immune system; this way you can cope with anything that may come your way.
There is also a combination of 3 hom. remedies that I have been recommending to people to take as prophylaxis (twice weekly) to avoid getting the flu.
Visit Grace's web site.