The CDC has just published a seismic study linking spontaneous abortions in women to flu vaccines. The study reviewed data for the 2010-11 and 2011-12 flu seasons. Women vaccinated with the inactivated influenza vaccine (IIV) in the 2010-2011 season were 3.7 times more likely to experience a spontaneous abortion within 28 days than women who had not received the vaccine.
Over the entire study period (2010 to 2012), the odds for a spontaneous abortion for vaccinated women were 2.0 times greater than for those women not receiving the flu vaccine. Both figures showed a statistically significant increase in miscarriages when women received their flu shot. The median gestational age for spontaneous abortion was seven weeks in the affected pregnancies.
