There have been other threads that dealt with allergic reactions of different levels to CA fumes and CA dust. I am more allergic to the dust, but also have a lesser but different allergy to the fumes. I use a mask. IF the fumes are strong, I will have watering eyes and even some double vision the next day. So I had to get a face mask and use a fan to blow fumes away. I have a 9 x 12 shop with lots more WW machines. I don't have room for a DC at this location. Even if I did, the noise would draw the ire of a neighbor's house 6 feet away to the side and 8 feet behind. (This is Japan.)
Back to the allergies. My MAIN allergy happens like this: From fumes and from CA dust (if not using a full facemask) I will go to sneezing within about 6 to 8 hours. If it is real bad, I get flu like symptoms, very stuffy nose or very runny nose, some sneezing, headache, chest congestion, coughing. Eyes get red too. This can last from 24 to 48 hours.
Maxwell above said this: "Pneumonia's a viral or bacterial produced chest infection - not caused by CA or rain; is caused by catching a bug, and by having a worn-down system...
I have run into a few doctors who have said the same thing and dismissed the connection. The last part of that statement - "by having a worn-down system..." When I go for several days with little sleep, my body will get tired, allergies flare up, eventually I get a week long cold or even flu. The virus or bacteria are around ALL the time. A weak or tired system leads to one thing that triggers something else.
I had an allergy doctor tell me 30 years ago that he saw a direct relationship in many of his patients and their "rest activity" or amount of sleep (or rather lack of it). Allergies do NOT produce pneumonia. But weak and tired bodies open the body up to such. Runny noses and eyes, congestion from the chest brought on by different kinds of allergies will certainly put the body in a situation that can lead to worse situations. My allergies mimic a cold and if I push through and keep working without enough rest, It WILL become a cold or worse, with fever.
I will say that probably in some cases, an extreme chest congestion allergy could probably mimic pneumonia in its symptoms.