[QUOTE=Downandup;2451141]Like this? [URL]https://www.independent.co.uk/news/health/roche-test-covid-antibody-coroanvirus-testing-uk-when-can-i-get-where-a9515571.html[/URL] At least it's part of a solution.[/QUOTE]This is the other type of test. A test for antibodies. It would say you have had the virus and have developed antibodies. But it doesn't say whether or not you have an active case. The other types of testing are for the virus directly. To tell whether you have an active case.
Both of these tests could be useful for travel, but as far as I know there is no country that is allowing people in based on a positive antibody test and a negative virus test. That's the so-called immunity certificate, or immunity passport idea.