If you believe it, you won't. From an idealistic point of view, the neighbor's serious illness will not affect the fortune, but the neighbor's feng shui may.
For example, the size of the opponent's gate is higher than his own, and the color of the opponent's gate conflicts with the five elements represented by the color of his own gate, which will affect the fortune.
From the materialistic point of view, it is better to keep a correct attitude than to believe in these things. As long as you have a positive attitude, setbacks will only make you stronger.