Yes, walking pneumonia is contagious and can spread from person to person through respiratory droplets released when an infected person coughs, sneezes, talks, or has close face-to-face contact with others. It is most commonly caused by a bacterium called Mycoplasma pneumoniae, which usually leads to milder symptoms than traditional pneumonia. Because many people feel well enough to continue their normal daily activities, they may unknowingly spread the infection to family members, coworkers, classmates, or others around them.