be concered for be concerned about 不同在哪里

Question

为什么可以说concerned about his illness?

Answer 1

应该是没有区别的,都是表示使担心,使烦恼的意思

Don't be concerned about/for me.
We are all concerned for /about her safety.

Answer 2

concern （for/about/over） sth/sb都有担心；忧虑；焦虑；焦急的意思
Eg:There is now considerable concern for their safety.
public concern about corruption