You would have to check with Mexico/Mexico City to know for sure. It wouldn't hurt just to be sure to get one.
Absolutely
I think it is required.
Yes
I have no idea, but in my opinion I think you should
From what I just read, they want a specified quarantine time if you don't have a covid shot card. This is different in various parts so I've seen though so you may want to check with where you are specifically going.
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