Pneumonia is a disease that causes the air sacs in the lungs to fill with pus or fluid making it difficult for oxygen to reach the bloodstream. You can develop this disease in one of your lungs or in both lungs at the same time. This disease can be mild or very serious. It's also possible that you have pneumonia and don't know it, called walking pneumonia. It is easier to get pneumonia if you are under two or over 65 because you have a weaker immune system. The history of pneumonia is very interesting. Pneumonia has been around for an eternity throughout history. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay Around 460 BC, a Greek physician named Hippocrates described the symptoms of the disease. In the 19th century, people actually discovered that the disease was not just the symptom of other diseases, but was its own disease. Subsequently, Edwin Klebs, a German pathologist, observed the bacteria that cause pneumonia for the first time under the microscope. This happened in 1875. Carl Friedlander and Albert Frankel determined which two bacteria were most likely to cause pneumonia in the 1880s. By the 1930s, many ways to combat pneumonia had been developed, but the disease was still very common and deadly. In the United States, approximately 423,000 people are diagnosed with pneumonia each year. These diagnoses were made after a person went to the emergency room due to severe symptoms. This disease is so common and dangerous that 66.9% of people over the age of 65 have received a pneumonia vaccine. The number of deaths of people over 65 is 50,622 people per year. This is a dangerously high number. Additionally, pneumonia kills 16 percent of children under the age of five. In 2015, the disease caused the death of 920,136 children. 15.9 people out of 100,000 die from pneumonia. Although pneumonia is very deadly, it has been cured in many people in the past. An 18-year-old boy once went to the hospital when he began having severe flu-like symptoms. He was later diagnosed with pneumonia, but had to be sent to a larger hospital when he started having a very high fever and couldn't stop coughing. His fever was 100.4 degrees Fahrenheit. He was then started on some strong antibiotics. Eight days later the fever went away, which was a good sign. After 27 long days he was finally released. This is the success story of a severe case of pneumonia that could have been fatal if it had not been treated so quickly. Bacteria, viruses, and fungi are all ways you can get pneumonia in everyday life. Streptococcus pneumoniae is a very common cause of pneumonia caused by bacteria. This can occur on its own or can sometimes occur after having a cold or flu. Viruses also cause pneumonia. They are the most common cause in children under the age of five. The viruses that these children get and cause the flu or cold can also cause pneumonia. This type of pneumonia is usually mild but can be serious. Pneumonia caused by fungi is the least common. This type of pneumonia usually harms people with chronic illnesses or weaker immune systems. The fungi that cause pneumonia can be found in the soil depending on where you live. You may also develop pneumonia while hospitalized for a different illness. This is called hospital-acquired pneumonia. This type of pneumonia is very dangerous because the bacteria the person has contracted will probably resist it more easily.