The CDC has just published a seismic study (Donahue et al.) 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 had 3.7-fold greater odds of experiencing a spontaneous abortion within 28 days than women not receiving 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 7 weeks in the affected pregnancies. Most alarmingly, in women who received the H1N1 vaccine in the previous flu season, the odds of spontaneous abortion in the 28 days after receiving a flu vaccine were 7.7 times greater. For every flu season, starting in 2010-2011, there has been an H1N1-type virus included in regular flu shots in the United States. For the current 2017-18 flu season, the CDC still recommends that all flu vaccines contain H1N1. This study raises concerns whether this particular strain of influenza antigen is safe during pregnancy.
The vast majority of the flu vaccines in the years of the study were multi-dose formulations, containing 25 micrograms of mercury via the preservative thimerosal. In those years, out of approximately 150 million flu shots given in the U.S. annually, less than 50 million or 34% of those vaccines available for pregnant women were thimerosal-free….