Author: Chris Downey

FDA: risks of DNA from cell lines used in vaccines

According to the FDA, “Viral vaccines and biological products contain contaminating residual DNA from cell substrate… DNA is a biologically active molecule whose activities pose a significant risk to vaccinees; thus, the amount of DNA needs to be limited and its activities reduced”

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Update Stripe webhook after deploying Heroku review-app

When creating new VaxCalc features, we like to use Heroku’s review-apps for testing them in a production-like environment. Manually updating the Stripe test webhook url with every new review-app deployment was starting to become a pain, so we created a rake test to do the following:

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Our child died of an adverse reaction to the hepatitis B vaccine

This beautiful tribute website to baby Ian, who died from a Hep-B vaccine adverse reaction, has been down for many months, possibly years. However – we captured it a few years ago along with the Vaccine Court acknowledgement that the vaccine did indeed cause his death.

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Managing Rails app Stripe credentials in a Heroku pipeline

When we first setup a Heroku pipeline using review apps, the best way to manage credentials wasn’t clear. Here’s what we came up, which is working really well and gives us great flexibility.

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Calculate total amount of ALL vaccine ingredients ever received

We often receive questions about how to calculate the total amount of vaccine ingredients ever received. Let’s do this now for a fully vaccinated 12 month old baby. The 2019 CDC recommended schedule shows us how many doses of each vaccine the doctor will (want to) give:

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