TED-Ed: Why is pneumonia so dangerous? | Eve Gaus and Vanessa Ruiz

The video explains the function of alveoli in the lungs and how pneumonia disrupts this process. Pneumonia is caused by pathogens like viruses and bacteria, which can bypass the body's defenses and infect the alveoli. The immune system responds by sending white blood cells to fight the infection, but this can lead to inflammation and fluid buildup, making breathing difficult. Treatment involves antibiotics, and recovery can take weeks. Risk factors include smoking, age, and health conditions. Prevention includes vaccines, good hygiene, and healthy living.

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