Why do you catch a cold on such a hot day?

A cold on such a hot day is caused by the following aspects: 1, in hot summer, sweating and sweat gland secretion consume a lot of energy; 2. Due to the long days in summer, the sultry weather affects people's sleep and rest; 3, people's loss of appetite, like to eat light food, affecting the intake of protein; Due to the hot weather, people's physical exercise time is reduced. These reasons lead to the decline of human resistance, so the cold virus will take advantage of it, so it is easy to catch a cold. In addition, due to people's desire for coolness, long-term use of electric fan air conditioning is also an important factor for summer colds.