Scientists have discovered why people often suffer in the cold

As everyone knows, the cause colds are viruses, and therefore, the temperature change should theoretically not make a person more susceptible to illnesses. However, researchers from the University of Gothenburg in Sweden have found out why the sudden change of weather often make people sick.

Many countries have covered the epidemic of influenza. Although the incidence of influenza begins to increase from the beginning of October, the pathogens spread particularly strong in January and February. But in spite of this knowledge sometimes flu overtakes us, even at a time when we are taking all preventive measures. A new study helps to understand why this is happening.

Aerosol particles containing the virus or liquid, more often distributed in cold and dry weather. If the air around us is dry, it absorbs moisture and particulate matter are reduced, easier to carry by air. This is a much more important factor in the spread of flu than the large crowds in enclosed spaces that are observed in winter weather, the experts found.

Watching the seasons, and of 20000 samples of the virus, the study analyzes collected from the nasal cavity in people who sought medical help in Gothenburg. Then, the prevalence of respiratory disease was compared with the time of year and weather conditions on the basis of information from weather forecasters. The results were more than obvious - outbreaks are activated in about a week after the really cold weather and low humidity.

According to the authors, it is the sudden changes in temperature, are starting for the beginning of this epidemic of influenza. And when it starts, even the temperature rise is not able to stop it, as the flu infected a lot of people.