FDA和WHO认可的疫苗都可以！中国疫苗ok！

“The CDC considers someone fully vaccinated with any FDA-authorized or approved vaccines and any vaccines that (the World Health Organization) has authorized,” said spokesperson Kristen Nordlund. That list could change pending additions by either agency, she said.

补充内容 (2021-09-21 15:20 +8:00):
可能我没说清楚 是回美用的的疫苗证明。