Etihad Airways has launched a Covid-19 risk-assessment tool to help passengers determine their probability of having contracted the virus and whether they should be traveling. Etihad developed the 22-question assessment, which it said takes about five minutes to complete, with Austrian healthcare technology company Medicus AI and based it on World Health Organization guidelines. The tool currently is available on Etihad's website and will soon be available on the carrier's mobile app. Use of the tool is voluntary for Etihad passengers, according to the carrier.