The COVID-19 vaccine has been scientifically proved to save lives, but for a select group of people in the religious realm, a more important matter is at stake -- eternal salvation. As the delta variant of the coronavirus spreads, many Americans resist COVID-19 vaccines, some citing the uncertainty of long-term side effects, others lacking trust in the medical field. Some vaccine resisters have been galvanized by the idea that the shot is the "mark of the beast."