Vaccines For Preventing Influenza In Healthy Adults, Cochrane Database of Systematic Reviews July, 2010
- There are over 200 viruses and agents that cause influenza. The flu vaccine covers up to 15% of those.
- "4% of unvaccinated people versus 1% of vaccinated people developed influenza symptoms." (So, 96% of people who didn't get a flu shot avoided getting the flu on their own, when exposed.)
- "Vaccination had no effect on hospital admissions or complication rates."
- "We found no evidence that vaccinations prevent viral transmissions."
- "Inactivated vaccines caused local harms and an estimated 1.6 additional cases of Guillain-Barré Syndrome (a form of progressive paralysis) per million vaccinations."
- "Industry funded studies were published in more prestigious journals and cited more than other studies independently from methodological quality and size."
- "Studies funded from public sources were significantly less likely to report conclusions favorable to the vaccines."
"The results of this review seem to discourage the utilization of vaccination against influenza in healthy adults as a routine public health measure."Here's Tom Jefferson from the Cochrane Vaccines Field describing the findings: