The BNT162b2 mRNA vaccine has this digital code at its heart. It is 4284 characters long, so it would fit in a bunch of tweets. At the very beginning of the vaccine production process, someone uploaded this code to a DNA printer (yes), which then converted the bytes on disk to actual DNA molecules. - Reverse Engineering the source code of the BioNTech/Pfizer SARS-CoV-2 Vaccine / HN