Yes
In theory, the contagious period for pneumonia lasts about two weeks, although a person tends to be most contagious when symptoms are at their worst -- which is usually around day two to four of the infection. A person with either viral or bacterial pneumonia is contagious. However, that person's germs are more likely to cause an upper respiratory infection (such as the common cold or the flu) in another person than pneumonia.  23 Followers. A. Pneumonia may be contagious. Though not usually easily spread, pneumonia may be transmitted through the infected individual's sneezing and coughing activity. Pneumonia may be caused by viruses, bacteria, or breathing in fungi spores.  Pneumonia is an infection of the lungs, caused by germs such as bacteria, viruses, and sometimes fungi. The infection in your lungs causes them to become inflamed, and may fill up with fluid or pus. This often causes one of the most common symptoms associated with pneumonia, cough. So, is pneumonia contagious? Prevent pneumonia and the spread of other contagious infections by: Avoiding contact with people who have a virus or bacterial infection (ie. a cold or the flu). Washing your hands frequently. Not Smoking. Smoking weakens your lungs making you more susceptible to infection. Pneumonia is inflammation (swelling) of the tissue in one or both of the lungs. It’s usually caused by an infection – most commonly, bacteria and viruses, which are contagious. It can also be caused by breathing in a foreign object (aspiration pneumonia) or, in rare cases, a fungal infection, which is not usually Aspiration pneumonia. Pneumonia can also be caused by breathing in a foreign object, such as a piece of food, or a harmful substance, such as smoke. This is called aspiration pneumonia. If breathing in a foreign object leads to a bacterial infection, this is contagious. It can also be caused by breathing in a foreign object (aspiration pneumonia) or, in rare cases, a fungal infection, which is not usually Many contagious pneumonias have names such as bacterial pneumonia, viral pneumonia, Mycoplasma pneumonia and MRSA (methicillin-resistant Staphylococcus aureus) pneumonia that indicate the type of pathogen infecting the lung. There are many other descriptive terms, such as community-acquired pneumonia, hospital-acquired pneumonia, and aspiration pneumonia (examples that suggest the source of the organism[s] causing the pneumonia). They are all potentially contagious. Pneumonia is inflammation of the lung usually caused by bacterial or viral infection (rarely, also by fungi) that causes the air sacs to fill with pus. If inflammation affects both lungs, the infection is termed double pneumonia. If it affects one lung, it is termed single pneumonia. There are many other descriptive terms, such as community-acquired pneumonia, hospital-acquired pneumonia, and aspiration pneumonia (examples that suggest the source of the organism[s] causing the pneumonia). They are all potentially contagious. There is no simple answer to this question. Pneumonia can be both, contagious and non-contagious depending upon the cause of pneumonia. Moreover, the contagious causes of pneumonia are not contagious throughout the course of illness, but only during a certain period. A bacterial pneumonia is less likely to be contagious after taking antibiotics for few days. The pneumonias caused by bacteria and viruses are usually contagious, where as those caused by fungus and chemicals is not contagious. Pneumonia can also be caused by chemical injury to the lung tissue. This may occur due to inhalation of toxic fumes or gases (for e.g. in a fire or industrial accident) Bacterial Pneumonia Contagious. Whether or not bacterial pneumonia is contagious depends upon the type of bacteria causing the infection. In many cases, people contract pneumonia when bacteria they normally carry in the nose or throat are spread to the lungs. Most kinds of bacterial pneumonia are not highly contagious.  Pneumonia is contagious when the causative pathogens (usually bacteria or viruses) are expelled when an infected person coughs to produce droplets. These expelled droplets contain the bacteria or virus that causes the pneumonia. 
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is infectious pneumonia contagious