In the Love Story, the exact type of cancer Jenny had wasn't clearly stated. It could have been any form, but the focus was more on the emotional aspect of their relationship.
The contagious nature of cavernous form of lung cancer was relatively strong in the initial stage. However, after about two weeks of effective treatment, the infectious rate of cavernous lung cancer would be greatly reduced, or even lose its infectious rate. Therefore, timely and standardized anti-inflammatory treatment can reduce the infection and reduce the spread of the disease.
Dexter Morgan indeed met his demise in the novel. The author chose this ending to bring a conclusive and perhaps unexpected turn to his character's journey.
I'm not sure who Morgan is specifically. There could be many people named Morgan. As for the story, without more context, it could be any kind of story, like a personal adventure, a fictional tale, or a historical anecdote.
The information about Chen Guilin's cancer was inconsistent. In document 2, it was mentioned that Chen Guilin was told that he had terminal cancer, but in document 3, it was clearly stated that Chen Guilin had never had lung cancer. The one who had lung cancer was Gui Qing. Therefore, based on the information provided, it was impossible to determine if Chen Guilin had cancer.