If you ask the International Air Transport Association, in future you'll be carrying a book of personal vaccine information and test results on holiday. If you ask Beijing it will be a pixelated square of QR codes. There is little consensus. However, one thing is for certain: the current leather-bound passport, we all know is about to get an overhaul for post pandemic travel.
Last Friday, Chinese President General Secretary Xi Jinping tuned into the G20 summit with a suggestion for QR bar-code based travel permits. The proposal that other countries could adopt a Chinese system of "internationally accepted QR codes" was reported by state-run news agency Xinhua, as a way in which the movement of goods and people might resume between China and its international partners.
While details of the app were sparse, the suggestion that China might be put in charge of running the rails of an international heath and travel database was met with scepticism. Critics of the country's record on privacy and human rights were quick to say such passports could be used as a "Trojan Horse" for "political monitoring and exclusion."
However, the point is moot; the current information carried by travellers is not sufficient to keep future pandemics in check. Digital databases or additional travel documents may become as vital as the passports we are used to travelling on.