Indoor relative humidity can effectively prevent respiratory infections

To date, many scientific studies have pointed out that the relative humidity in the room will affect the health of the human body. Dr. Stephanie Taylor of Harvard Medical School's Infection Control Center (Stephanie Taylor) called on the World Health Organization to evaluate the scientific evidence on the correlation between humidity and health, and make the best recommendations for public organizations on indoor relative humidity to reduce the spread of respiratory diseases.

According to the recommendation of Dr. Stephanie Taylor, the ideal indoor relative humidity should be maintained at 40-60%. This indicator should effectively reduce the spread of indoor respiratory diseases, such as the new coronavirus and influenza. If the indoor relative humidity is too low, working in an office, shopping in a mall, eating in a restaurant, etc., these prolonged gatherings will greatly increase the chance of contracting respiratory diseases.

The relationship between air humidity and the new coronavirus

A study in the British journal "Transboundary and Emerging Diseases" pointed out that the spread of the new coronavirus is related to air humidity. The lower the humidity, the drier the air, and the relatively higher risk of infection.

Researchers from Australia and China jointly found that a 1% drop in humidity will increase the number of confirmed cases of the new coronavirus by 7-8%. This is due to the fact that dry air helps the virus droplets to float for a long time and are more likely to adhere to people, leading to a relatively higher chance of infection.

In the dry air of less than 40%, the body's respiratory immune system has limited defense functions and is more susceptible to virus infection. In addition, due to lack of water, the survival time and suspension time of the virus will be longer, and it is easy to stick to people.

On the contrary, in the ideal 40-60% of the air, the respiratory and immune system functions of the human body can effectively play a role in resisting the virus. Moreover, with enough water, the virus's survival time and suspension time will be shorter, and it will be difficult for the virus to adhere to people.

How to effectively maintain indoor relative humidity

In order to reduce respiratory infections more effectively, you can maintain indoor air humidity through the following methods:

  • Use humidification machine
  • Manual humidification using a sprayer
  • Plant wide-leaf plants
  • Wipe with a damp cloth

However, it is worth noting that the indoor humidity cannot be increased excessively at one time, which will cause the walls and windows to repel moisture, mold, and long-wall cancer. Therefore, you can use a hygrometer to test the relative humidity in the room and try to maintain a proper relative humidity.

The benefits of relative humidity

The proper air humidity (40-60%) is the most comfortable indoor humidity for the human body, which also has more benefits for human health.

In low air humidity, a large amount of water on the surface of the human body is lost, and the elasticity of the skin is reduced, which will accelerate the aging of the skin, causing the appearance of rough epidermis and cell shedding. In high air humidity, because the water content in the air is too high, the amount of evaporation is low, which will make it difficult for human sweat to evaporate, and it is easy to feel sultry and discomfort, and mold will grow more easily.

Proper air humidity is extremely important to the human body, especially people who work in the office for a long time, because long-term exposure to an inappropriate humidity environment will impair their health invisibly and greatly increase the chance of contracting respiratory diseases.

In order to prevent the next wave of the epidemic, air humidity is also an important factor to consider and cannot be ignored.

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