The plan is to do testing on all passengers prior to boarding flights to countries that require COVID-19 test certificates for entry. For the first time a finger prick test was used prior to today’s Dubai – Tunis, Tunisia flight.
If this is feasible at scale, then expect it to be a practice that spreads (and makes it easier for countries to require such a practice). Expect it to add to the time, hassle, and expense of travel, but also to open up borders faster.