The US and Canada have limited "non-essential" travel. What does that mean, practically? Is it possible for a vaccinated Canadian citizen with a valid passport to travel by air to the US and return? (Or the other way around.) If so, what exactly should they bring and do to ensure smooth travel?
The CDC appears to say that all you need is negative test within three-days, and a rapid antigen test is okay. COVID-19 vaccinated travellers entering Canada seems very vague, but they specifically disallow rapid antigen testing. Then there's apparently necessary ArriveCan; is there a US equivalent? Is there a specific, detailed list of measures in place, in addition to the regular travel checklist, specifically for Covid-19, that says exactly what is permitted and what is necessary?