If it is some sort of disease or malady, we use "stricken", but otherwise we use "struck" for the past participle of "to strike".
"She has been stricken by cancer."
"She has been struck by cancer."
I note that the "struck by cancer" sounds ok.
However, here's an example of stricken that doesn't seem to follow that rule.
"I move to have that stricken from the record."
Is this a leftover from a time when stricken was properly the past participle of "to strike"?