It’s not really a novel about a pandemic. It’s just that one of the main characters is a doctor who treats cholera, but the disease itself is not a major factor in the story. It’s primarily a love story about a man who remains in love with a woman despite the fact that she gets married and has a whole life with this doctor, but when he dies, this man, now an old man, professes his love for the same woman he fell in love with as a youth. It’s a beautiful story, but the title may be a bit misleading.
If you want a real pandemic novel, I’d suggest “The Plague” by Albert Camus.