Can static current damage usb port of MI A2?

I was copying some files from mia2 mobile to my friend's pc which seems to have earthing problem and static discharge. When I was disconnecting phone and accedently touched the other tip of the usb connected to phone, I felt shock(mild). Now I'm being paranoid about damage this could have done inside the phone circuitry. Does modern smartphone have any measure to combat such static current? Thank you.

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