Understanding Johnsy's Illness
Johnsy, a character from O. Henry's short story "The Last Leaf," suffers from pneumonia. This is a serious lung infection that can be life-threatening, especially when left untreated. Here’s a detailed explanation:
What is Pneumonia?
- Pneumonia is an inflammatory condition of the lungs caused by infection.
- It can be triggered by bacteria, viruses, or fungi.
- Symptoms include cough, fever, chills, and difficulty breathing.
Johnsy's Condition in the Story
- Johnsy becomes ill with pneumonia after a prolonged period of illness and despair.
- Living in a cold, damp environment exacerbates her condition.

Significance of Johnsy's Illness
- Pneumonia reflects her fragile mental state; she loses the will to live.
- The illness serves as a backdrop for the themes of hope, sacrifice, and the human spirit in the story.

The Role of the Last Leaf
- The last leaf on the vine symbolizes hope and the will to live.
- Johnsy's recovery is linked to her faith in the leaf, demonstrating a connection between mental and physical health.
Conclusion
- Johnsy's battle with pneumonia highlights the importance of emotional well-being in overcoming physical ailments.
- The story beautifully intertwines her illness with broader themes, making it a poignant narrative about life and hope.
In summary, Johnsy's illness is pneumonia, which not only affects her physically but also symbolizes her struggle against despair.