Question about "Keyloggers" ...

[1StrongBlackMan]

If Norton identifies a site as a "keylogger", are the keystrokes captured for everyone clicking into the site, or does one have to log on to the site to be affected.

Second question: does the keystroke capture only apply to the stroke done on that site, or once infected, will the keystrokes continue to be captured.

Third question: Once "infected", or suspected that one is "infected, what steps should be taken.