 Lufthansa is to offer passengers Covid-19 tests at Frankfurt airport that provide results within hours and can be linked to individual tickets in an effort to allow travellers to avoid quarantine. The airline has joined forces with German company Centogene, which opened a walk-in testing centre at the airport on Monday that it said would act as a blueprint to opening international borders. Passengers coming through the hub will be able to pay for a test that provides a result within two to three hours, and that will soon be integrated with Lufthansa boarding passes. 