I've had bronchitis at least 5 times, that's landed my in the ER and pneumonia twice(that i recall) that was in both lungs and almost killed me and walking pneumonia once, which was in both lungs and gave me a fever of 105. Those have been, one of them, every year, for like 5 years, before that every other year, cuz those times I had strep throat so bad I had to be taken to the ER cuz I actually could not breathe.