Is it really effective to use negative ion air purifier to keep warm in spring for cough, asthma and bronchitis?

Urban air pollution, coupled with physical problems, especially when the air pressure is usually low in different seasons, will make irritating allergens more likely to be scattered in low-lying areas, more likely to invade the human body, and will also induce asthma silently, causing changes or even imbalances in the neuroendocrine environment of the human body. Causes bronchiectasis, increases airway secretions, and is more likely to induce asthma. Air negative ions can effectively strengthen the ciliary movement of tracheal mucosa, affect the respiratory enzyme activity of epithelial villi, improve alveolar secretion function and lung ventilation and ventilation function, thus having the functions of relieving bronchospasm, increasing vital capacity, regulating respiratory frequency and relieving cough. Negative ions can also promote the regeneration of nasal mucosa epithelial cells, restore the secretion function of mucosa, and improve bronchitis, bronchitis, respiratory system and other diseases.