The U.S. will require vaccination for visitors to enter the country by air.
The Chinese Sinopharm and Sinovac vaccines will count for entry. Prior infection plus a single dose of Pfizer or Moderna will not – even though a single dose of an mRNA vaccine is likely more effective than Sinovac, and prior infection and one vaccine dose produces the greatest level of immunity to infection.
However he U.S. is far from the only country whose travel requirements aren’t entirely consistent with science, or internally consistent.
Austria welcomes visitors fully vaccinated with Sinovac’s Coronavac vaccine but will not treat these vaccinations as eligible to check into hotels. (HT: C.K.)
The following vaccines (including mix-and-match vaccines) are recognised: BioNtech/Pfizer, AstraZeneca (Vaxzevria and Covishield), Johnson & Johnson, Moderna, Sinovac, and Sinopharm. (Please be aware that this only applies to entering the country. Sinovac/Sinopharm are not valid for entering hotels, restaurants etc. within Austria.)
Hundreds of millions of doses of Sinopharm and Sinovac vaccines have been ordered, but recipients of these vaccines – while eligible to enter Austria on the basis of their vaccination – cannot check into a hotel without a negative Covid-19 test.
On the other hand, restricting recognition of these vaccines may make more sense than the U.S. policy.