Factual error: In the scene at the race track where they show the virus infecting and destroying cells in the blood stream, they clearly show that it is red blood cells being infected. Viruses, in order to replicate, require the cell's DNA replication machinery. However, mature red blood cells in the circulation no longer possess this machinery since they no longer have a nucleus or DNA. It would therefore be impossible for this virus to replicate.
Mission: Impossible 2 (2000)
Ending / spoiler
Directed by: John Woo
Starring: Tom Cruise, Ving Rhames, Brendan Gleeson, Thandie Newton, Dougray Scott, Richard Roxburgh, John Polson
Tom Cruise kills Dougray Scott, gets the girl. However he doesn't quite complete the mission because he destroys all the chimera instead of retrieving some of it. But they live happily ever after anyway.
Mirel
More mistakes in Mission: Impossible 2
Sean Ambrose: In just a few hours you can be assured of going down in history as the typhoid Mary of "Aus." G'day.
Trivia: When Nyah is trying to convince Ethan to shoot her, she says "Do it. Now!" There is still about forty minutes left in the movie, but those are the last words she says.
Question: How did Ethan Hunt know he was going to switch places with Hugh at the end of the film requiring him to take two masks with him to swap different faces?
Answer: The only thing I can think is because they're in Sean Ambrose's hideout, and he's an ex-IMF operative, then he possibly had the gear required in there. Ethan found it before the encounter with Hugh, and it's simply not shown. Other than that, it's an error.