Reruns aired from December 23-27 with a special intro from Pat actually referring to them as such (or in his preferred words, "evergreen shows") and explaining that he'll be back soon, and the episodes' OAD's were displayed in the corner at the top of the show. Oddly, these were counted as new episodes even though TV listings listed them as reruns (albeit in the wrong order). I know someone who works master control at WREX in Rockford, and he sent me a picture of the slate of the January 3 episode, which was not a rerun, and it was numbered S-7105; if the reruns are not counted, it should have been 7100 (yes, that means it's the 7,100th episode of the syndicated Wheel series). So now, Wheel's episode count is 5 greater than it really is.
New episodes were aired for December 30-January 3, again with a special message from Pat explaining that they were taped before his surgery (although January 3 was actually taped after he returned; the production slate noted the VTR as 12/05/19, the first taping day with Pat since his return, with the other episodes taped that day airing January 10-14).
Vanna's third week as host begins airing today. Her co-host is being hyped as a big secret and still hasn't been revealed officially yet, but it's very likely Maggie Sajak, Pat's daughter, which isn't really worth all the hype IMO. I caught the promo for today on WABC during Live with Kelly & Ryan, and the co-host wasn't even mentioned, just that Vanna was hosting again.
Regardless, even if Vanna's co-host were somebody big like Oprah or Ellen or a Kardashian or something crazy like that, it would no doubt be overshadowed by a certain event on a certain other game show happening this week, which happens to fall during Wheel's 45th anniversary as a series, nonetheless.