@Blackbird : I would gift them a hand made gift basket of "COVID Survival" - their favorite candy, the cozy socks or slippoers sound nice, a box of the Vicks shower tablets, tylenol - items to help them through a bout of COVID if they get it, but can also use on a regular day so it won't go to waste.
My sister and her daughter had COVID a few weeks ago, so I did a "make your own" via Amazon. I did a snack bag box for my niece (she's 7), the vicks shower tablets, a thermometer (so they didn't have to share), an "I survived COVID 19 in 2020" set of coffee mugs, some cough drops, soothing teas, and a fleece blanket throw. Oh, and a coloring book. -- My sister had it pretty bad, but my niece only had a cough for a few days, so it helped them and they LOVED it. - Since my BIL was quarantined too I also got them a $100 doordash gift certificate.
I went a bit overboard because of my niece, but the idea is sound - you can put what you want in it.