IMHO you’re missing an option on your poll.
I chose “I do now that they have been talking about it but hadn’t heard it before”
but my actual answer would be: “I know it refers to items that people wear for protection from Covid-19, but I don’t know what it’s actually an initialism for.”
So I looked it up just now before posting this; and I’ll have to look it up again, because I’ll forget what it stands for.
I was not familiar with the term, and the first time I heard it on the radio - weeks and weeks ago now - I was annoyed: “c’mon, guys, don’t use abbreviations no one knows!” But within a day or two, it felt like a term I’d always known.
Still do all the industrial PPE plus the arc flash uniform and cut resistant gloves I take off to put the high voltage gloves on (1000V rated), electrical meters. Now they’ve added medical masks under the face shields. This is it now since I gave up the ammonia contact hazmat gear.