CAN COLD WEATHER ACTUALLY MAKE YOU SICK?

A common cold is caused by a virus. That is the simple part. The more interesting part is why colds and other respiratory infections seem to arrive with the weather.

Cold temperatures do not spontaneously create an infection. You still need exposure to a virus. But winter changes behaviour and biology at the same time: people spend longer indoors in closer contact, ventilation may be poorer, humidity changes, and laboratory research suggests cooler nasal temperatures can alter local antiviral immune responses.

That is why “cold weather makes you sick” is both wrong and not entirely useless. The weather is not the pathogen; it can be part of the environment in which pathogens spread.

Practical prevention remains less glamorous than most winter-wellness marketing: vaccination where appropriate, hand hygiene, ventilation, avoiding close contact when ill and giving your body ordinary sleep, food and recovery.

Wear the coat because being cold is unpleasant. Do not buy an expensive “winter immunity” product because somebody confused thermal comfort with antiviral protection.

“Wear the coat because being cold is unpleasant. Do not buy an expensive “winter immunity” product because somebody confused thermal comfort with antiviral protection.”