Questions in "Travel Bans"

What were some of the biggest restrictions during the pandemic?

If I’m fully vaccinated, can I still enter countries with bans?

Can countries just ban people from other countries legally?

My trip got blocked by a ban—what now?

How do I know if I’m banned from entering a country?

Do bans stay forever or get lifted quickly?

Is there a difference between banning travelers and stopping visas?

If there’s a ban, are there any exceptions?

What reasons cause governments to block travelers?

I keep hearing about countries being banned. What does a travel ban actually mean?