In general, we think that it is easy to catch a cold when the weather is cold or changing. However, low temperatures are not a direct cause of colds. It’s really the cause of illness. Let’s see what experts say. This article will help you solve the misconception and give you a better understanding of the connection between cold weather and the prevalence of colds.
The Muse of a cold: Who is the culprit of the disease?
Viruses are the main cause of illness, not the cold weather, and it only occurs when you are exposed to Rhinoviruses or infected with the flu virus, which is prevalent. The peak is spring and autumn, and the peak of influenza is in winter.
Cold weather, on the other hand, stimulates the immune system. America Army Research Institute of Environmental Medicine studies point out that the immune system’s response to cold weather, such as when going out without a coat or scarf in winter, researchers find that low temperatures do stimulate The effects of the immune system, especially the human body’s natural “deceptive agent” – Norepinephrine increased secretion.
hypothermia slows the immune virus into the void
In addition, hypothermia is also a risk factor that increases the risk of colds. When the body temperature is in a different state, it can easily cause a cold, which suppresses the immune system, causing the immune system to effectively combat the nose. Virus. In addition, when going out in winter, blood vessels contracted, especially on the surface of the skin, such as the blood vessels in the nose, which dry the nasal cavity, resulting in reduced function of the nasal filtration virus. When you return to the room temperature, the blood vessels diastolate again, but the nasal congestion becomes severe, you must breathe with your mouth, dry indoor air and the weakening of the function of the nasal filtration virus, which contributes to the virus in the nasal mucus causing a cold.
Winter long waiting room virus easily spread
Cold air may be an indirect cause of colds. When the weather gets cold, people tend to stay in warmer places indoors. Air conditioning is also a good way to spread cold or flu viruses. Outdoor dry air may also be a conduit for flu outbreaks, and the National Institutes of Health notes that the flu virus It can survive and spread in dry and cold air, but in the winter near zero, the virus is more covered, resulting in more active, adaptable, and more susceptible to infection.