Scientific explanation of superstitious fortune-telling daughter's fever caused by thunder

When people are too frightened, the brain will take self-protection measures, reduce some sensory functions, and even lose consciousness seriously. But it will also reduce some other functions, such as the immune system, and then people will be invaded by viruses, and then they will catch a cold and have a fever. Of course, it is hard to say whether this scientific explanation is scientific or not, and many phenomena cannot be fully explained. For example, some children are scared to get sick, and it is useless to run around in major hospitals. As a result, as long as they follow the methods mentioned by some magic wands, they will be fine soon.