Cases of sickness made up a very small percentage which in my opinion was normal. However, propaganda pamphlets dropped from aircraft were telling the workers to feign illness, and detailed instructions were given to them on how to do it.
All sensible Army people turned gas warfare down as being utterly insane since, in view of your superiority in the air, it would not be long before it would bring the most terrible catastrophe upon German cities, which were completely unprotected.
Temporarily in 1934 I became a department head in the German Labor Front and dealt with the improvement of labor conditions in German factories. Then I was in charge of public works on the staff of Hess. I gave up both these activities in 1941.
All I know is that these two gases both had a quite extraordinary effect, and that there was no respirator, and no protection against them that we knew of. So the soldiers would have been unable to protect themselves against this gas in any way.
