Question

what is johnsy,s illness what can cure her the medicine or the willingness to live

Answer 1

Johnsy was suffering from the disease pneumonia. Only the willingness to live could cure her. She had made up her mind that she was not going to get well, The doctor said that if she did not want to live medicines would not help her.
Hope this will help you.

Answer 2

Answer :

In the short story 'The Last Leaf' by O. Henry, Johnsy was suffering from pneumonia.

According to Johnsy's doctor, only the willingness to live could cure her of her illness. Optimism and the willingness to live played a major role in the curative power of medicines. If a person had lost the willingness to live, it reduced their chances of getting well by half.