You’ll be fine, that’s not gonna happen. Releasing an actual plague upon the world would be extremely difficult to control and, most importantly, you need to understand why: mutations. Viruses can mutate hundreds of thousands times in a matter of months - how can we be sure it won’t make the vaccines ineffective and just kill off the entire planet? You should read up on epidemiology. Edit: I’ve also read up on nanomachine technology recently and saw that they’re a much more plausible threat to humanity. If they can be programmed to kill anyone that doesn’t have whatever was put in the jab, THEN you have a legitimate concern.