Infections usually start out as upper respiratory infections, such as from a cold and then travel down into your lungs (lower respiratory infection). Other times it's from getting the flu and a secondary infection sets in, such as pneumonia or acute bronchitis. Other times you could get acute bronchitis from being exposed to a lot of irritants in the air (such as wood dust, heavy pollution etc). And some peoples lungs are more susceptible to lower respiratory infections, if they have a pre-existing lung disorder, such as asthma, or COPD.
Thank you so much for this information. My symptoms were sore throat, headache, body ache and chills (flu symptoms). I started taking over the counter meds. The day I went to doctor, my symptoms were only sore throat and coughing and I was hoping to get the normal penicillin for sore throats and I wasn't given it. I have had upper resp infections in the past but never heard of lower. I searched online and cannot find too much info.
My office at work started going through renovations so now I'm wondering if I got sick from that because the workers took up old dirty carpet and replaced and painted. We also had to remove everything from the office prior to the workers starting.