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2. Influenza - Wikipedia

   en.wikipedia.org/wiki/Influenza

   Pneumonia may be caused by the primary viral infection or a secondary bacterial infection. Primary pneumonia is characterized by rapid progression of fever, cough, labored breathing, and low oxygen levels that cause bluish skin. It is especially common among those who have an underlying cardiovascular disease such as rheumatic heart disease.

3. Pneumonia - Wikipedia

   en.wikipedia.org/wiki/Pneumonia

   Pneumonia is due to infections caused primarily by bacteria or viruses and less commonly by fungi and parasites. Although more than 100 strains of infectious agents have been identified, only a few are responsible for the majority of cases.

4. Influenza pandemic - Wikipedia

   en.wikipedia.org/wiki/Influenza_pandemic

   Bleeding from the ears and petechial hemorrhages in the skin also occurred." [28] The majority of deaths were from bacterial pneumonia, a secondary infection caused by influenza, but the virus also killed people directly, causing massive hemorrhages and edema in the lung. [63]

5. What You Need To Know About the Cold and Flu Season

   www.aol.com/know-cold-flu-season-141800126.html

   The CDC classifies flu viruses as A, B, C, and D. Types A and B are seasonal flu, and influenza A is broken down further into subtypes and strains. For example, current subtypes include H1N1 and H3N2.

6. Pneumococcal infection - Wikipedia

   en.wikipedia.org/wiki/Pneumococcal_infection

   There is an association between pneumococcal pneumonia and influenza. Damage to the lining of the airways (respiratory epithelium) and upper respiratory system caused by influenza may facilitate pneumococcal entry and infection. [6] Influenza also modifies the innate immune system into a state more accommodating to pneumococcal infections. [7]

7. It's Cold & Flu Season: Here's How to Tell if Your Senior ...

   www.aol.com/cold-flu-season-heres-tell-165900863...

   Pneumonia can be caused by a buildup of bacteria, viruses, or fungi in the lungs. There are several types of bacteria that can cause pneumonia, some typical and some atypical.