The JAMA article “Evaluation of the association of maternal pertussis vaccination with obstetric events and birth outcomes,” November 2014 was conducted to see if the new practice of injecting pregnant moms with the Tdap has any negative outcomes. Since this vaccine contains a very large dose of aluminum, the adverse effects I would expect to see would likely show up after infancy. Hopefully they will continue to follow these children and see if they are neurologically harmed by this neurotoxin exposure during critical brain development periods in the womb. Sadly, the Tdap is now routinely recommended during every pregnancy in the USA. I say sadly because there have been no safety studies on injecting this amount of aluminum during pregnancy.

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As it is considered unethical to use pregnant women in clinical trials for vaccines how can the drug companies and medical profession say that it is safe for a pregnant woman to be given any vaccine!

A few years ago the black box warning said to not give to pregnant women as it's never been tested on the fetus. I don't think that they have done any safety studies since then.