there are no germs that just cause pneumonia but many pathogens (viruses bacteria etc. ) can result in pneumonia. while the disease is not contagious the germs that cause it may be but exposure does not necessarily mean the exposed person will get pneumonia. they may just get a cold or nothing at all. influenza is definitely contagious and influenza can result in pneumonia in some people.
is pnemonia contagious if you got it from having the flu? fever is still present and antibiotic hasn't been started yet.