There is no way to predict outcomes. Most people with mild to moderate exposure generally recover fully in three to five days, but some develop chronic problems such as reactive airway disease. Smoking or pre-existing lung conditions like asthma appear to increase the risk of long term complications.
Chlorine gas poisoning
Carbon monoxide poisoning
Nitrogen dioxide poisoning
Cyanide poisoning
Salicylate poisoning
Arsenic poisoning
Organophosphate poisoning
Aluminium phosphide poisoning