Pneumonia is a common respiratory infection, affecting approximately 450 million people a year and occurring in all parts of the world. It is a major cause of death among all age groups, resulting in 1.4 million deaths in 2010 (7% of the world's yearly total) and 3.0 million deaths in 2016 (the 4th leading cause of death in the world). There are various causes of pneumonia including bacteria, viruses, and fungi. Pneumonia can be acquired from different sources such as in hospitals, the community, or through use of ventilators. Pneumonia is a type of lower respiratory tract infection, and is also the most deadly communicable disease as of 2016. Rates are greatest in children less than five and adults older than 75 years of age. It occurs about five times more frequently in the developing world versus the developed world. South Asia and Sub-Saharan Africa have the highest prevalence of pneumonia in the world. We can prevent and treat pneumonia through vaccines, proper treatments, and healthy practices. Hospital-acquired pneumonia Hospital-acquired pneumonia is pneumonia that is acquired in a hospital setting at least 48 hours after being admitted. Pneumonia is the second most common hospital-acquired disease, while also being the leading cause of death among hospital-acquired infections. Hospital-acquired pneumonia is also seen to be the cause for nearly half of all the antibiotics taken within hospitals worldwide. A sub-type of hospital-acquired pneumonia, known as ventilator-associated pneumonia, is described as pneumonia acquired more than 48 hours after an endotracheal intubation procedure was performed. It is also seen to be the most common infection in intensive care units (ICUs), making up around 70-80% of the cases of hospital-acquired pneumonia in ICUs. The primary pathogen that can cause hospital-acquired pneumonia is dependent on the geographical location but overall, it was found that six most common bacteria that caused most hospital-acquired pneumonia cases were S. aureus, P. aeruginosa, Klebsiella species, E. coli, Acinetobacter species, and Enterobacter species. While the majority of these pathogens are bacteria, it is possible for multiple pathogens to infect at once and cause pneumonia. Community-acquired pneumonia Community acquired pneumonia is the source of most pneumonia cases and is categorized as cases of pneumonia developed outside of the hospital or medical facilities. Community acquired pneumonia is one of the leading causes of hospitalization due to an infectious agent. Streptococcus pneumoniae bacteria, a type of typical agent, cause about 50% of this form