There have been several recent cases of actors falling ill in the period after the Tonys. Know why this is? Because Tony season is incredibly punishing. In addition to doing eight shows a week, performers are expected to show up for events, luncheons, promotional appearances, morning TV performances (often requiring a 4am wake up the night after performing a show), etc. It's not hard to see how immune systems can become compromised, or voices can get shot.
But no, actors usually don't just call out after the Tonys. Or if someone has a vacation scheduled for around that time (like Cynthia Erivo did last year), it's often announced weeks in advance.
"You travel alone because other people are only there to remind you how much that hook hurts that we all bit down on. Wait for that one day we can bite free and get back out there in space where we belong, sail back over water, over skies, into space, the hook finally out of our mouths and we wander back out there in space spawning to other planets never to return hurrah to earth and we'll look back and can't even see these lives here anymore. Only the taste of blood to remind us we ever existed. The earth is small. We're gone. We're dead. We're safe."
-John Guare, Landscape of the Body