Many people are currently infected with the corona virus and the number of cases continues to increase. In addition to the current measures against the spread of the virus, higher temperatures and extra air humidification in rooms can reduce the risk of spreading the virus.
Research data on the current corona virus in combination with the results of the SARS and the MERS epidemics provide new and interesting insights into the conditions that increase virus transmission. The effects of air humidity and temperature was examined closely.
Can high humidity slow the corona virus spread?
“The rate of transmission from human to human is influenced by indoor conditions,” explained Dr. Walter Hugentobler, FMH General Physician, and Dr. Stephanie Taylor, Harvard Medical School, Medical Advisors for Condair Group. The study results show that low humidity and very low temperatures enable the viruses to survive on surfaces and in the air for a long time. The virus survival was also long at medium temperatures of 20 to 30 °C, but only in connection with a low air humidity. Very high temperatures of more than 30 °C inactivate the corona viruses.1
A new statistical study from China also comes to the conclusion that higher temperatures and higher air humidity significantly restrict the spread of the corona virus.2 This is consistent with context also speaks for the fact that the spread is far greater in the currently colder regions of the world.
Reduce health risk by humidification
The virus is transmitted from person to person mainly in buildings and in public transport. When the outside temperature is low, public transport and indoor spaces have their central heating on. The result is usually temperatures from 20 to 23 ° C in combination with a low humidity of 20 to 40%.
These temperature and humidity values are ideal climatic conditions for a long survival of corona viruses on surfaces or in the air. This increases the risk of transmission from contacts and droplet infections.
Step 1: Determine the temperature and humidity of the room air
You cannot influence the outside climate yourself. You can, however, ensure an optimal room climate: You can control the decisive factors, temperature and humidity, individually.
You can measure the temperature with a thermometer. The temperature range which is pleasant for humans is between 20 and 23 °C. A significantly higher room temperature will permanently stress the organism. It is therefore advisable to increase the humidity in order to reduce the risk of infection in buildings.
You will need a thermo-hygrometer to measure the temperature and the relative humidity simultaneously. Place the measuring device in the room. After a short time, the device gives you the corresponding percentages.
With TFA devices you are always on the safe side. Accurate sensors and tested quality provide you with reliable measured values.
All-in-one devices such as the weather stations measure the temperature, the air humidity, and many other measured values. These devices also support you in creating the optimal indoor climate.
Step 2: Adjust air humidity
It is important that you increase the humidity indoors to reduce the risk of viruses being transmitted. A value of at least 50% in buildings is considered optimal in this context.1
In addition, a humid indoor air improves the defence function of the airways in healthy people. Discover our tips for optimal air humidity. We give you simple tools to actively fight the virus.
An increased proportion of fresh air should result in an additional risk reduction. As a result, ventilation can reduce the risk of infection with viruses. Therefore, pay attention to the tips on how to properly ventilate. An improved indoor climate also has the advantage that the oral and nasal mucous membranes do not dry out too much, thereby strengthening the immune system in the defence against viruses.
1 Hugentobler, W .: Optimal air humidity reduces the risk of corona spreading. Press release Condair Systems GmbH. 02.03.2020.
2 Wang, J. et al: High Temperature and High Humidity Reduce the Transmission of COVID-19. SSRN. 09.03.2020.