Approved vaccine inconsistency could delay the restart of international travel, says WTTC Share The restart of international travel could be seriously delayed without worldwide reciprocal recognition of all approved COVID-19 vaccines, says the World Travel & Tourism Council (WTTC). The global tourism body, which represents the global private Travel & Tourism sector, has issued its warning following concerns tourists face being turned away at borders because countries don’t have a common list of internationally recognised and approved COVID-19 vaccines. This comes just days after a number of British holidaymakers, who had been administered the Indian Covishield batch of the Oxford/AstraZeneca vaccine, were rejected entry into Malta despite the drug being chemically identical to the UK-made vaccine.