By Zachary Stieber, The Epoch Times
Two researchers say the administration of Covid-19 vaccines to pregnant and breastfeeding women should be stopped after re-analyzing a study performed by researchers at the Centers for Disease Control and Prevention (CDC).
The study of more than 35,000 women who were pregnant and had an mRNA COVID-19 vaccine originally showed that side effects following vaccination were similar among pregnant and non-pregnant women. The findings are published in an Australian government guide (pdf) to Covid-9 vaccination for women.
The study, though, was corrected in September 2021 after concerns were raised by a researcher in Belgium. The CDC scientists acknowledged they should have made clear that they could not accurately calculate a risk estimate for miscarriages because follow-up data was not yet available for most of the women.
Dr. Simon Thornley, a senior lecturer in the University of Auckland’s Section of Epidemiology and Biostatistics, and Dr. Aleisha Brock re-analyzed the data and calculated the incidence of miscarriages in the first trimester was actually 82 percent to 91 percent in a paper (pdf) published in Science, Public Health Policy, and the Law.
Of the 827 pregnancies reported through the V-Safe registry, operated by the CDC, 712 resulted in a live birth. Nearly all of them were among women who were vaccinated in the third trimester. Of the other pregnancies, 104 resulted in miscarriage. Most of those occurred before 13 weeks of gestation.
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Thornley writes in his research paper that the use of mRNA vaccines in pregnancy is now generally considered safe for protection against Covid-19 in countries such as New Zealand, USA, and Australia.
“However, the influential CDC- sponsored article by Shimabukuro et al. (2021) used to support this idea, on closer inspection, provides little assurance, particularly for those exposed in early pregnancy,” says Thornley.
“The study presents falsely reassuring statistics related to the risk of spontaneous abortion in early pregnancy, since the majority of women in the calculation were exposed to the mRNA product following 20 weeks’ gestation.”
In his research paper, Thornley says re-analysis [of the original data] indicates a cumulative incidence of spontaneous abortion 7 to 8 times higher than the original authors’ results.
“In light of these findings, key policy decisions have been made using unreliable and questionable data,” states Thornley.
“We conclude that the claims made using these data on the safety of exposure of women in early pregnancy to mRNA-based vaccines to prevent COVID-19 are unwarranted and recommend that those policy decisions be revisited.”
It is also worth noting that in September the Wall Street Journal ran a story saying Pfizer researchers were still testing for the effects of covid vaccines on pregnant women, while New Zealand Ministry of Health was giving the procedure the all-clear. As of 4 November 2021, Medsafe reports that 13 women have miscarried following vaccination.