cancer
If Sarah-Jane hasn't died in The Sarah-Jane Adventures then she wont. Elizabeth Sladen, who plays Sarah-Jane passed away earlier this year.
Sarah Jane died because she was suffering from cancer.She died on her bed.
Elizabeth Sladen, the actress who played the character has died. Presumably, the character will die with her.
Sarah Jane Rees died in 1916.
Sarah Jane Woodson Early died in 1907.
Elizabeth Sladen died of cancer.
We don't know if Sarah Jane the character has died. Elisabeth Sladen, the actress, died of cancer. She apparently was fighting cancer for most of the series' run.
In Sarah Jane smith she killed ragweed by sending a huge alarm around London to destroy the ragweed. But this was due to braking their communication to each other so they will die.
Sara Jane played by Elizabeth Sladen passed away on the early hours of April 19th 2011
the woman Sarah Jane played by actress Elizabeth Sladen sadly passed away on the early hours of April 19th 2011 due to battling with Cancer! we will miss her
We do not know yet whether the character will be killed off officially (or just be allowed to exist "off-screen") but in real life the actress who played Sarah Jane, Elisabeth Sladen, died in April 2011.
elisabeth sladen died from cancer, now there is Sarah Jane adventures.