Children under 15 are classed on the basis of their accompanying adult's vaccination status.
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I had no issues travelling back to the Phils with my 7 year-old son last week... though he is vaccinated. Nobody asked to see any 'physical' proofs, or even brought up the subject.
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There are some helpful YouTubers out there (Jennifer Terri is another very good vlogger on the subject too).
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