Nothing is citing he's injured and he's played every game he's been able. That's classified as a healthy player, unless you think they're risking his career by playing him injured just to get in the playoffs of course.
It's not a simple binary either of being:
1. Injured and unable to play
or
2. 100% back to where he was before injury.
Have you ever heard them say it takes running backs in football 2 years to get back to where they were before an MCL tear, even though they are able to play a year later? Have you ever had surgery of any kind? I've had arthroscopic hip surgery and I could walk on it without crutches after six weeks but it was over a year before it felt normal. I recently had surgery for a broken wrist, they told me it will be 6 months to a year before it feels completely normal again.
No one except Vasy knows whether he's completely unaffected by the injury and surgery any more. Maybe he's completely unaffected by it by now and he's just not as good as he used to be. Only time will tell, as in multiple seasons, as it's not abnormal for even the greatest players to have peaks and valleys in their careers.
As someone pointed out today, Shesterkin, with a career save % of .920, is having just as bad a season as Vasy as they have matching save %'s, though Shesterkin has played 6 more games and didn't have back surgery this season. I don't know if he's had any other problems, he had some undisclosed injury in early November 2023, but NY still has the 8th highest point total in the league, so it says something about the rest of NY's team vs ours to this point.