The science behind vaccines is simple: Introduce the body to a small part of a pathogen, trigger the immune system to build antibodies to fight it off and create a lasting immune memory for any future invasions. But what if instead of immunity, a vaccine caused disease? That's a claim one image being shared on Facebook makes, citing the top authority tasked with regulating the safety and efficacy of biological products like vaccines. "The FDA confirms that the 1st vaccine dose correlates with increased COVID-19 infections," reads a graphic shared in an April 10 Facebook post. It goes on to claim a U.S. Food and Drug Administration briefing document reported 409 suspected COVID-19 cases among Pfizer vaccine trial volunteers – versus 287 in the placebo group – seven days post-vaccination. The original source for the image is a Feb. 21 article by Colleen Huber, an Arizona-based naturopath who runs a cancer clinic offering patients treatment with baking soda, vitamin C and a sugar-free diet instead of chemotherapy. None of these alternative treatments have been proven effective against cancer. Shared widely across social media, her online article has garnered nearly 12,000 interactions on Facebook and 1,100 on Instagram, according to social analytics platform CrowdTangle. Huber citing the FDA may appear compelling, but there's quite a bit she distorts. Here's what we found.