As long as you’re under quarantine and have tested positive for the coronavirus, you can’t travel outside of the United States. Even if you have an ESTA, a vaccination certificate, and a test certificate, you cannot fly if you show symptoms of coronavirus / COVID-19. Check with your travel agency or insurance provider to determine whether you will be paid for any damages that may occur as a consequence of your vacation plans. If you are unable to travel because of coronavirus, you will not be reimbursed for the ESTA fee. However, your ESTA will remain valid for use on your subsequent trip.
As previously indicated, travel restrictions to the United States will remain in effect until the ban is removed in November. Some persons are exempt from the travel limitations imposed by the United States, but only under specific circumstances. Travel restrictions for certain categories of persons do not apply in the United States. You can bet they’ve put in an NIE application (National Interest Exception).
As long as US residents, family members, and NIE carriers are exempt from the travel ban, the limits on travel to the US will remain in effect until the end of November.
The ESTA also allows US citizens and those with US nationality, as well as their children, spouses, or partners, to be exempt from US travel restrictions. Unmarried siblings of U.S. citizens under 21 and parents or legal guardians are likewise exempt from this rule.