In many stories about viruses and mutations, zombies (or other names) are stronger than ordinary people, regardless of speed, attack power, and fighting ability. One detail in the film is that Robert Neville gets up early (because of the sun) and works out, but the zombies who live in the dark are extremely agile and have the ability to learn.
Closing the notebook, I envision an opposite frame that could write a short sci-fi story. If a virus spreads and some people are immune and others are infected, the infected people don't get stronger symptoms. Instead, they become weaker and less able to survive. In this way, those who were originally weak will become stronger because of this, and the world will feel like the cart before the horse is turned upside down. They can slaughter those opponents who are better than themselves at will...
There have always been some messy thoughts recently, and this is just one of them.
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