A January 20th Health Impact News Daily post, in regards to influenza vaccines, states that Tom Jefferson, a researcher with the independent Cochrane Collaboration, told Northwestern.edu that, "There is no evidence that vaccines can prevent deaths or prevent person-to-person spread of infection.”
According to the Cochrane Collaboration, flu vaccines might be effective against only influenza A and B, which represent about 10 percent of all circulating viruses. The combined results of these trials showed that under ideal conditions (vaccine completely matching circulating viral configuration) 33 healthy adults need to be vaccinated to avoid one set of influenza symptoms. In average conditions (partially matching vaccine), 100 people need to be vaccinated to avoid one set of influenza symptoms. Fifteen of the 36 trials were funded by vaccine companies. Four had no funding declaration.
According to the independent research reviewers: "Our results may be an optimistic estimate because company-sponsored influenza vaccines trials tend to produce results favorable to their products and some of the evidence comes from trials carried out in ideal viral circulation and matching conditions and because the harms evidence base is limited.”