各位打了新冠肺炎疫苗之後跟 CDC 登記了嗎？注射後 六週內 須要 register
打過疫苗的人，需註冊疫苗護照的網站，以便出國時方便使用:
https://www.cdc.gov/coronavirus/2019-ncov/vaccines/safety/vsafe.html

Registration Process
1. Go to vsafe.cdc.gov. ...
2. Enter your name, mobile number, and other requested information. ...
3. You will receive a text message with a verification code on your smartphone. ...
4. At the top of the screen, click Enter vaccine information.

登記了以後會有個人的疫苗號碼，帳戶，從那兒就能找到自己的 QR code, 手機上有它以後進出機場，甚至於大型室內活動中心（也許包括健身房）可能是通行證了。如果還沒有登記的話，現在也不遲。

V-safe After Vaccination Health Checker

Use your smartphone to report any side effects after getting the COVID-19 vaccine, as well as reminders if you need a second dose.

https://www.cdc.gov/coronavirus/2019-ncov/vaccines/safety/vsafe.html