Thinking of travelling? Here’s where mixed COVID-19 vaccines aren’t accepted “While CDC has not recommended mixing types of vaccine in a primary series, we recognize that this is increasingly common in other countries so should be accepted for the interpretation of vaccine records.”The news also confirms what the White House acknowledged earlier Friday would be a likely development: that the Oxford-AstraZeneca vaccine, approved by the WHO but not the FDA, would be deemed acceptable.The CDC had already given the green light to overseas travellers who received the AstraZeneca vaccine, but until Friday had not expressly confirmed the same policy for those crossing into the U.S.