Use of luciferin and luciferase in vaccine testing

Article title: "Claims that COVID jabs can be used to track you with ‘luciferase’ are false – the substance isn’t even in the vaccine"

FTA: "Luciferase and luciferin, when used together, are useful tools in the early prototyping of drugs and vaccines. However, neither are in the COVID vaccines that have been safely administered to more than half of the world’s population."