What is Article 16 and why did the EU make a U-turn after triggering it?

on
A row over COVID vaccine supplies prompted the EU to use the "nuclear" option of invoking Article 16 - but then it quickly changed course, so what is it all about?

from World News - Breaking international news and headlines | Sky News https://ift.tt/3cwgqNk
https://ift.tt/eA8V8J