And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their RIGHT HAND, or in their FOREHEADS:
Revelation 13:16 KJV

Frequently asked questions
1.on which arm is the covid 19 vaccine being administered?
The choice is absolutely up to you,you can choose your left hand or right hand ,this goes against the scriptural reference above that specifically says right hand or forehead
2.can i choose which arm i get the covid 19 vaccine ?
Just like any other vaccine the answer is yes,most people took it on their left arm

3.is the covid 19 vaccine a single dose or double dose vaccine
The covid 19 vaccine is a double dose vaccine,after the first dose you will get the second dose 8-12 weeks after,there is no single scriptural reference/verse of recieving the mark of the beast in two doses

Conclusion
Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.
2 Timothy 2:15 KJV
Our God does not mistake concerning His choices of words,with God right is right,left is left,A is A ,B is B.....God is perfect.
We have the scriptures let us read it,hear it and rightly divide it, rather than the imaginations of men

On the final note, let's us not sleep as others do, let's be careful and watchful of stuffs coming from these guys as they would eventually usher in the beast and it mark,you can likewise choose to avoid anything coming from them.God bless you all.