Let me say that I am not a scientist. I follow a few on Twitter. Some are saying that closing borders is a weak tool now that we have the vaccine and better testing. In particular, Ashish Jha of Brown University. In any case, Omicron is already in the UK and in most countries. Closing borders will just hurt global trade and the economy, and is not sustainable any more. Instead, he suggests better testing and the inevitable vaccine passports, or maybe even both.
What do people think?