The Washington Post dropped this provocative headline on its readers yesterday, “Researchers find a hint of a link between flu vaccine and miscarriage.” And you know what will happen next –every anti-vaccine website will claim that the flu vaccine causes miscarriages.
Of course, the evidence based facts fail to support the future trope that the flu vaccine causes miscarriages. A careful reading of the Washington Post article is filled with nuance and hedging, because the underlying published article does not actually provide robust evidence that any flu vaccine increases the risk of miscarriages.
The Washington Post made several points that are important to consider, and we’ll examine the underlying research in more depth. But the most important point they made is that,
The findings suggest an association, not a causal link, and the research is too weak and preliminary, experts said, to change the advice, which is based on a multitude of previous studies, that pregnant women should get a flu vaccine to protect them from influenza, a deadly disease that may cause serious birth defects and miscarriage.