Originally Posted by Taximom5
Teacozy, the study you posted is from 14-15 years ago, and was directed by the CDC Epidemic Intelligence Service Officer, who is now the CDC's Associate Director of Adult Immunizations.
The study posted by Mirzam is much more recent, and the Hong researchers appear to be free of the conflict if interest shared by the CDC and the vaccine manufacturers. It also provides proof that
1) The flu shot does not prevent lab-confirmed influenza any better than placebo
2) the flu shot results in nearly 5 times the number of flu-like illnesses as placebo
3) the flu shot results in lowered ability to fight off other viral infections.
Hong Kong researchers appear to be free from conflict of interest you say? Ok then. Here is a randomized controlled study of over 700 children and the effectiveness of the flu vaccine since you say that the flu shot does not prevent influenza any better than the placebo.
" Methods. One child aged 6–17 years in each of 796 households was randomized to receive 2009–2010 seasonal trivalent inactivated influenza vaccine (TIV) or saline placebo between August 2009 and February 2010.
Results. Receipt of TIV (trivalent inactivated influenza vaccine) led to 8–13-fold mean geometric rises in antibody titers against seasonal A and B viruses, but only 1.5-fold mean geometric rises against the pandemic A(H1N1) virus that was not included in the vaccine. Children who received TIV had a reduced risk of seasonal influenza B confirmed by RT-PCR, with a vaccine efficacy estimate of 66% (95% confidence interval [CI], 31%–83%). Children who received TIV also a had reduced risk of pandemic influenza A(H1N1) indicated by serology, with a vaccine efficacy estimate of 47% (95% CI, 15%–67%).
Conclusions. Seasonal TIV prevented pandemic influenza A(H1N1) and influenza B infections in children. "
Here is another study (not done in Hong Kong) with over 3,000 people that also shows that the flu vaccine does not cause other respiatory illnesses.
"We investigated the association between influenza infection, vaccination, and detection of other respiratory viruses among children<5 years old and adults≥50 years old with acute respiratory illness who participated in seasonal studies of influenza vaccine effectiveness. Methods. Nasal/nasopharyngeal samples collected from 2004-2005 through 2009-2010 were tested for 19 respiratory virus targets using a multiplex reverse-transcription polymerase chain reaction (RT-PCR) platform. Vaccination status was determined using a validated registry.
Influenza was detected in 12% of 2010 children and 20% of 1738 adults. Non-influenza respiratory viruses were detected in 70% of children and 38% of adults without influenza. The proportion vaccinated did not vary between virus-positive controls and pan-negative controls in children (p=0.62) or adults (p=0.33).
Influenza vaccination was not associated with detection of non-influenza respiratory viruses. "