People in such situations purchase a plan like Liaison International, which would cover the insured for a short amount of time. Here is the plan info: Liaison International Insurance Option 1
You can buy this plan online. All you need is her name, passport number, and date of birth. You can buy this at any time, but we recommend at least 24 hours before she boards the plane to America as it can take up to a day for the policy to become active.This plan will cover any new medical conditions that starts after the plan becomes effective. This plan will not cover pregnancy or pre-existing conditions. Write us back if have any more question or need any help.
Insurance rates are regulated by law. You can't find the same insurance plan for a lower price anywhere else