I initially started my son on the Influenzium/Gelsenium regimen over 10 years ago as he had a compromised immune system (being born at 1 lb 3 oz) and not wishing to have anymore chemicals injected into him; of course my husband and I also started the same regimen. My son, who is now 15-years-old, and my husband and I have never had the flu since starting this regimen. This is an incredible effective regimen to prevent getting the flu and I would highly recommend to anyone looking for an alternative to the flu shot to start this regimen. Connie