Scientists from two American universities have discovered a previously unknown mechanism of the nasal immune response. This explains the factor of a greater likelihood of getting SARS in the cold. colds” />

According to experts, it was previously assumed that people are more likely to get the flu in cold weather, because they spend more time in rooms where it is easier for viruses to spread by airborne droplets. Recent scientific work by representatives of Northeastern and Massachusetts Universities has shown that it is biological episodes that are actually the causes of seasonal fluctuations in viral ailments. of respondents reacted to a pair of cold-provoking viruses. The experts noticed that all pathogens trigger exosomes from the nose, but in doing so they use a signal that is different from that used to counter microbes. Scientists have also identified a mechanism responsible for antiviral actions: elements that are not based in cells, when penetrated, act as baits, carrying particles with which fragments of the disease bind instead of nasal cells.

Then, the experts decided to test how cold affects this procedure, in connection with which the condition of healthy volunteers who were at room temperature was analyzed. After that, they were transferred to a room where it was 4.4 degrees Celsius. It turned out that the temperature inside the nose dropped five degrees. As part of a new stage of the experiment, scientists studied the tissues of the nose, and as a result, the immune response slowed down. The number of corresponding exosomes decreased by 42%, and they also found a violation in the work of antiviral proteins.

Source: nauka.tass.ru

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