Just STOP. American english: its always been shot. British english: its always been jab. Heres an example for smooth brains http://www.studyenglishtoday.net/british-american-english.html
WHY on earth this vaccine from hell is, and has been from the beginning, referred to as the 'jab' rather than 'shot' should really be a question on everyones mind. Is it yet another mind control compliance test on how well their narrative maker & sustainer the M S M can influence minds? WTAF is going on? Are they trying to sneak Americans back under British rule? Oh how ridiculous. Yeah ok. So just know every single time an American calls it the jab, you have literally just without question done exactly what they wanted, as an unaware and compliant citizenry. Im sure you all remember that phrase. And yes, every little thing matters, and if you think it doesnt then heres some helpful advice: wake up.
I remember talking with some Venezuelans back when Chavez was trying to take control of the country. They strongly resented people from the USA calling themselves Americans because they saw it as evidence that the USA wanted to control all of North and South America.
Nothing could convince them otherwise - not even Canadians saying that they had no objection at all to the label.
English is a very complex language where words are borrowed from other languages or specifically chosen for a wide variety of reasons. Some alternative reasons for using "jab" have already been stated in response to your post, and there are others that could be stated.
The chance that "jab" is being used as a Trojan horse to subjugate the USA to the UK seems about as likely as "American" being used to control all of North and South America.
you are correct, sir. do not let these cockwombles influence you. it is all theatre.