The CDC reports there’s been an increase in cases of ‘walking pneumonia’ among young children, which is sure to have some parents concerned. “Right now, we are seeing a lot of all different types of pneumonia. There’s bacterial, viral and what we call atypical pneumonia. Walking pneumonia usually refers to an atypical pneumonia, and we're certainly seeing a lot more of that, but walking pneumonia can be different things,” explained Camille Sabella, MD, pediatric infectious disease specialist for Cleveland Clinic Children’s. “It's usually not your standard bacterial pneumonia. Walking pneumonia is usually caused by something called mycoplasma pneumonia, but it can also be very similar to viral pneumonias as well.”