Rupert Grint (L), Melissa Rycroft (C) and Brian Littrell (R) have all been stricken with H1N1. (WENN.COM file photos)

HOLLYWOOD -- They may have their team of personal trainers, nutritionists and assorted other well-being practitioners on call 24/7, but the cold, hard fact of the matter is, celebrities get sick, too.

And some, much to the anguish of their publicists, will contract the dreaded swine flu.

It's already officially taken out a Weasley, a Backstreet Boy and a last-minute Bachelor reject.

But just as many seem to have been misdiagnosed, despite persistent Internet rumours to the contrary.

Or have they?

That's where those spin doctors come in.

For a while there, Miley Cyrus was looking to be on the H1N1 list, especially after her friend and former Hannah Montana co-star, Cody Linley, had said in interviews that Miley told him so herself.

Turns out both were mistaken, according to her rep, and that Miley's virus turned out to be a bad case of strep throat.

Assuming that's the case, it's still easy to see why personal publicists are anxious to stop swine flu rumours in their viral tracks, and not just because they're concerned about creating undue panic.

As one unnamed source tells us, "Anything in this business that makes you seem medically fragile affects your ability to get insurance. And without insurance you can't get hired. It makes producers wary of working with you."

Things are complicated enough when you are stricken in the middle of a gig.

Rupert Grint, Harry Potter's Ron Weasley, was among the first of the current crop of H1N1 victims, when he came down with what his handlers called a mild bout of the bug in July while shooting Harry Potter and the Deathly Hallows (damned drafty Hogwarts!)

Fortunately, he recovered in time to attend the rainy London premiere of Half-Blood Prince, looking admittedly anemic himself.

Last month, Backstreet Boy Brian Littrell found out he was among the infected the day before the release of the boy/man band's latest comeback album, This Is Us, forcing the cancellation of several planned high-profile performances.

Reality TV denizen Melissa Rycroft may have bounced back from being spurned by The Bachelor to more respectable runner-up status on Dancing with the Stars, but she was unable to sidestep the swine flu.

Miley aside, among those heading the growing list of false alarms are David Boreanaz and Susan Boyle.

When Boreanaz came down with flu-like symptoms, production of his Fox series Bones was shut down for an entire day, with the show's own creator citing H1N1 as the culprit on his Twitter account.

He subsequently recanted his Tweet when it turned out Boreanaz just had a touch of plain old influenza.

When Boyle was recently rushed to a Scottish hospital complaining of stomach pains, swine flu again raised its ugly head, but fears proved to be unfounded.

The truth is, despite frantically swapping Red Bulls for Tamiflu, celebs are prime candidates for contagion.

They work long hours on stuffy, enclosed sets with large crowds of people, travel long distances in planes and do a lot of handshaking.

Even the whole H1N1 moniker sounds like the stuff of Hollywood marketing makeovers, doesn't it?

"From the people who brought you TMNT2, X2, ID4, M:i:III and 2F2F comes ..."

Now that's really sick.