We would encourage all travellers to check the travel restrictions in place for your destination as some have specific restrictions depending on your place of origin or recent travels. The International Air Travel Association has a useful country by country guide.
Should you not be able to join the trip you have booked due to being denied entry at short notice or even upon arrival to the country, or be required to enter quarantine on arrival, MBA and your local host will assist you in any way we can in making suitable arrangements. All expenses for alternative travel, testing, treatment or self-isolation will need to be covered by you.
With respect to your booking, in extraordinary circumstances like these that significantly affect your ability to join the trip booked, we will treat your booking as if it were postponed by your local host. See what happens if my trip is cancelled?