Can you catch pnemoia from someone else?

NOT USUALLY, but.... Depends on type : e.g. Walking pneumonia (mycoplasma) is mildy contagious and is now recognized as one of the most common causes of community-acquired pneumonia. Most common ages 5-20 but can occur any age. However only 5-10% of infected patients actually develop pneumonia. Most people with viral or bacterial pneumonia don't pass it to the people around them. Here's a tip: avoid people w/cough.