Too many answers saying that the current will travel only through your hand, thus not wreaking any havoc. This is both wrong and dangerous.
Current will flow ANYWHERE in your body.
Any possible path connecting the two fingers will see current flowing through.
Supposing DC and our body to be perfectly homogeneous, then the longest the imaginary path, the lowest the current, but there will always be some. You’ll have most of the current flowing through your hand, but some through your heart and even your feet.
Speaking about damage, that depend on the source. But if the voltage is high enough (and the current is not limited) then sure you can have damage anywhere in your body
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