Skip to content

Do vaccines cause blood clots, cancer, and infertility?

The Claim:

A British holistic doctor claims that COVID vaccines are causing blood clots, cancer, and infertility.

The Facts:

Anti-vaccine activists have used prior concerns about a particular type of blood clot associated with adenovirus vector vaccines. mRNA vaccines, like Pfizer-BioNTech and Moderna, have a minimal risk of blood clots, unlike COVID itself, which significantly increases the risk of blood clots and stroke.

Dr. Paul Offit explains that it’s virtually impossible for DNA fragments in COVID mRNA vaccines to cause harm, such as cancers or autoimmune diseases.

He outlines three protective mechanisms in our cells that prevent these DNA fragments from causing harm: the cytoplasm’s immune mechanisms and enzymes destroy foreign DNA; the DNA fragments lack a necessary signal to enter the nucleus; and they also lack the integrase enzyme needed to integrate into our DNA There is no scientific evidence or plausible mechanism suggesting that these DNA fragments would alter our genome to cause cancer.

Lastly, a study with 32 women found that neither getting COVID nor getting the vaccine had any bad effects on their ovaries. So, these worries about the vaccine affecting fertility are not supported by the evidence.

Disclaimer: Science is always evolving and our understanding of these topics may have evolved too since this was originally posted. Be sure to check out our most recent posts and browse the latest Just the Facts Topics for the latest.

Just the Facts Newsletter:

Correcting this week's disinformation

Sign up to get a weekly look at the latest vaccination facts as we debunk the latest false vaccination claims making the rounds on the internet.


Back To Top