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I'm just looking at it from common sense.  How could the mark be taken accidentally? 
If it is being peddled as part of an already established system, say, as a sacrament in the Catholic Church. Then I could see people getting it through ignorance.

 Scripture sets up the antichrist as a powerful, global figure who draws people to his new religious views.
Like, perhaps, an apparent charismatic Pope holding prayer meetings with all of the world's religions to promote Masonic indifferentism? 

  Once he gains power, he orders the mark be taken, as a show of solidarity.  It's truly a "choose your side" decision.  Christ/Church vs antichrist.  Very similar to Moses vs pharaoh.  Both sides work miracles to awe the people but God's miracles are real, while the antichrists'/Pharaoh's are not.  There isn't a middle ground.  Mark or no mark.
A magic potion that cures you from a worldwide blight which is required to hold a job or make an income?

We're not even close to this type of thing in our day.  The jab has no political nor religious significance, only moral significance (abortion cells). And there's no antichrist/leader to order the mark.
We are certainly close to it. And I've shown you that with my other responses.

I disagree that we are not close.  I feel that we are very close, and possibly closer than even we think.

"At the time when Antichrist is about twenty years old, most of the world will have lost the faith." -Bernardine von Busto

Yeah, it's hard to pin an exact date on most of the world having lost the faith.  2000?  1980?  I don't know.