The idea was launched by the boss of the Australian airline company Qantas last November. It had had the effect of a small bomb in the air environment. “We are going to modify the terms and conditions of reservations on international routes, so as to impose vaccination against Covid-19 before boarding”, explained the Australian CEO Alan Joyce. The latter mentioned the project of a health passport, in the form of a digital application, grouping together different information (results of PCR tests, vaccine, etc.) on passengers. An idea that has since won over various companies.