NBC threat in GW1 & 2?

To settle an argument, can anybody tell me what the difference was (if any) in the NBC threat between the two conflicts? It was obviously sky-high in GW1 but was it the same in GW2? Furthermore, was there any actual shortage of NBC equipment and suits in either war?

I don't reall seeing as much evidence of Noddy suits in the most recent conflict whereas they seemed to be worn constantly in GW1.

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