Can you give booster Pfizer/Moderna/Janssen shots for Foreign COVID vaccines like... AstraZeneca/ SinoVac/ SinoPharm/ CoviShied?...

[anany]

Even though the WHO recognizes AstraZeneca/ CoviShield/ SinoVac/ SinoPharm for travel purposes (and being considered "vaccinated").. can you give booster 2nd or 3rd series shots to "Foreign" COVID vaccines that isn't recognized by the FDA/CDC yet here is the USA, but yet is recognized by WHO and/or EUA?

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[BidingMyTime]

Good question. I don't know that the CDC has said anything specific about this, but some other countries equivalents have said yes.
I don't think there would be any legal or health implications if you did, it would probably depend on the state protocol that you administer under if you should.