Flu jabs in the USA are free (??) — we have to pay for them in the UK. 
So "jab" is another Britishism? If you saw this headline would you just be like: "WTF?!" http://www.bbc.co.uk/news/health-41467097 …
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I mean I can see what it would mean. We say 'flu shot'
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Oh! Yeah, we say jab but I've heard shot.

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The word jab makes me not wanna do it.
End of conversation
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