A Pro-Vaccine Resource

Tuesday, May 12, 2026

After recently learning that infectious disease expert Amesh Adalja has a podcast, I listened to a few episodes while out yesterday. They're all short, but very interesting. One of these episodes, about Measles and the Avian Flu, mentioned a web site I'd never heard of before, Back to the Vax, which is run by two former anti-vaccine activists.

The site is devoted to promoting good health by fighting back against the anti-vaccine movement:

Heather Simpson is a former anti-vaxxer who dug deep into the science, and finally put her fears to rest. She is passionate about science communication as a way to overcome the most common vaccine fears. She has an 8 year old that inspires to create needle-less vaccines for all children. She is enrolled in school as a Biology major with a focus on Communications.

Lydia Greene was an anti-vaxxer for 12 years and wrote a story on her journey to changing her mind, and bringing her 3 children up to date. She is now in nursing school to get into public health, to deal with vaccine hesitancy on the front lines.

Together we share our story with anyone that will hear us. To our surprise, we have been welcomed back with open arms. We now give other people like us support and a platform to share their experience if they choose to.
Their stories and those of others appear on the site's blog. If I recall correctly, one of the founders bought the lie about vaccines causing autism -- only to learn that her unvaccinated son was autistic.

The site also features a 70-page booklet titled Vaccine Fears Overturned by Facts, which is a collaboration with the Immunize Kansas Coalition. I have not read the whole thing, but I am impressed by a few things I read that I already understood well-enough to evaluate, one example being its discussion of thimerosal, which reads in part:
Remember, "mercury" was removed from most childhood vaccines over twenty years ago! So how many vaccines still contain mercury? While none actually contain "mercury," multi-dose flu vaccine vials do contain thimerosal, a preservative that contains an ethylmercury group.

...

Yes, thimerosal is used as a preservative in multi-dose influenza vaccines, however it is also used in cosmetics, tattoo inks, eye drops and contact lens solutions, disinfectants, as well as in products used to treat contact dermatitis.

Methylmercury is the type of mercury found in fish. It can be toxic to humans at high exposure levels. This is why the FDA recommends limiting your intake of some types of fish.

Compounds containing ethylmercury, on the other hand, are cleared from your body faster than methylmercury and don't appear to be toxic. For example, methylmercury takes around 20-80 days to be cleared by half from the body, whereas thimerosal takes around 7 days to be cleared by half from the body...
Each section is listed in an annotated Table of Contents and includes a QR code by which anyone can go to the list of references for that section, an innovation that shortens the booklet, so that it doesn't seem like an inaccessible tome that nobody ever is going to have the time to trudge through.

I recommend perusing the booklet, because, while it is aimed at the vaccine-hesitant, it is also a handy catalogue of the myths driving the anti-vaccination movement, as well as refutations of the same.

The site's inclusion of the stories of recovering anti-vaxxers is good for a couple of reasons I can think of: (1) it helps the questioning anti-vaxxer feel seen, rather than preached to, and (2) it helps humanize anti-vaxxers to those of us who have never been anti-vaxxers and might be puzzled or even smug about them.

The first will motivate anti-vaxxers to help themselves, and the second will help the rest of us understand where they came from, and reach out to them more sympathetically and effectively.

With our Federal Government platforming a very evil person in Bobby Kennedy, Jr., we need efforts like this to fight back, and it is encouraging to see that this is indeed being done, and being done well.

-- CAV

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