WebMD Answers
The vaccine itself is not likely the issue, but rather the injection. Hidden under our opaque skin and subcutaneous tissue are nerves. The nurse may have given you the shot in a wrong location, or used a needle a bit too long, or it may have been a fluke -- hitting a nerve that shouldn't be there.
You will need to see your medical provider, and perhaps see a neurologist. Many times, these post-injection neuropathies will self-resolve, but you need to be examined. Your inability to lift your arm is not something that can be ignored.
This answer should not be considered medical advice...
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