I'm a little surprised that I have never heard of a zapper, but I have heard of people using light frequencies to heal their bodies of disease. I'll definitely look into it as I do believe in alternative therapies.
I have been using oxygen therapy for the past year. And I just recently found a video from Omaha where doctors there used oxygen therapy to cure a little girl of Swine Flu.
If it can cure Swine Flu, I don't know why it wouldn't cure you of any virus that has invaded your body. It has completely cleansed my body. Especially as doctors in Europe have been using oxygen therapy for years to cure people of AIDS, Cancer and certain nerve diseases.
You can get more information on oxygen therapy and watch the news footage here: Oxygen Therapy