In other news, scientists say we're probably going to need annual booster shots for the coronavirus because immunity doesn't last forever or as long as it does with vaccines for other things.
Meanwhile, Republicans in Tennessee are trying to bring back anti-transgender bathroom bills by moving new legislation that would require businesses to inform the public if they allow someone of "either biological sex" to use a bathroom that's appropriate for them.
Finally, the European Union is launching a legal challenge of Britain's choice to break the Brexit agreement by suspending checks in Northern Ireland for most of the year.
Britain’s withdrawal agreement with the EU leaves the British-ruled province of Northern Ireland in the EU single market for goods and so requires checks on goods arriving there from other parts of the United Kingdom.
Some of those checks are meant to start when a grace period expires at the end of March. The plans have already disrupted some supplies reaching supermarkets in Northern Ireland.
Britain says it intends to extend the grace period unilaterally until Oct. 1, a decision the EU letter demands it reverses.