YOU ARE REGISTERING FOR A DAY 3-5 TEST POST ARRIVAL IN US
Rules remain a bit unclear about the level of test supervision you need for testing on day 3-5 after arrival in the USA, but many are choosing to have a supervised test with certificate to be safe.
Vaccinated?
For vaccinated people, after arrival in US, day 3-5 tests are advised but not compulsory.
Unvaccinated minors travelling with vaccinated parents can follow the same rules as their vaccinated parents.
Unvaccinated?
Rapid antigen tests on day 3-5 are compulsory for unvaccinated travellers arriving in US, who also need to quarantine for 7 days regardless of test result.
You simply need evidence of having performed a test - full supervision with a certificate is more than sufficient. By entering your passport information too, you have confirmed your ID and can also use your certificate for onward travel if required.