Weather impact on mortality from coronavirus infection

US, WASHINGTON (ORDO NEWS) — Chinese doctors have studied how the weather affects the mortality rate of a new type of coronavirus (SARS-CoV-2) using the example of the situation in Wuhan. They found that the increased mortality rate was associated with low humidity and wide variation in day and night temperatures.

The experts published their findings in an article for the medRx electronic scientific library.

“For the first time, we monitored how air temperature, the scatter between its highest and lowest values, as well as humidity, affect the mortality rate from COVID-19 (a disease caused by a new type of coronavirus – ed.). Our study shows that variations in temperature and humidity strongly affect the mortality rate from coronavirus, “the scientists write.

Chinese scientists from Lanzhou City University and the Meteorological Administration of China (Shanghai) analyzed the data that doctors in Wuhan – the city where the outbreak of COVID-19 started – collected from January 20 to February 29, 2020, that is, when the epidemic peaked and then went on recession.

In total, nearly 2.3 thousand residents of Wuhan died during this time. Doctors compared the daily number of cases of their death with how the weather changed in the city at that time. Based on these data, they tried to identify a statistical relationship between meteorological factors and the lethality of the virus.

Weather and virus

Scientists’ measurements showed that such regularities do exist, which makes the SARS-CoV-2 coronavirus similar to its closest relatives, the MERS Middle Eastern fever virus and SARS-CoV-1 SARS, as well as the causative agents of other respiratory diseases.

Thus, an increase in the spread between temperatures day and night increased the mortality rate by 2.9%, while an increase in air humidity by one g / cm 3 decreased this indicator by about 11%.

In general, these indicators are comparable with how the mortality rate from various respiratory diseases that cause both viruses and bad habits or high air pollution changes.

As scientists emphasize, the patterns they received do not take into account how social factors, including migration and quarantine, influence the spread of the virus and mortality. It is possible that the weather affects this indicator more or less than current data show.

On the other hand, the very fact of the existence of such ties, according to doctors, indicates the need for further observations. Such information, in their opinion, can be critically important in order to predict how the COVID-19 pandemic will develop in the coming months and seasons of the year.

About the new coronavirus

Now in the world more than 219 thousand cases of infection with a new coronavirus (SARS-CoV-2) are registered, about 9 thousand infected have died, over 84 thousand people have recovered. Outside of China, the disease was detected in 159 countries, including Russia.

An outbreak of COVID-19 disease, which causes a new coronavirus, was recorded at the end of December last year in the Chinese city of Wuhan. In early March, the World Health Organization recognized that the disease had spread around the world, calling the situation with the COVID-19 pandemic.

A new type of coronavirus belongs to the same group of viruses as SARS and MERS, the causative agents of SARS and Middle Eastern fever.

Over the past ten years, both viruses have claimed the lives of several hundred people in the Middle East and East Asia, as well as repeatedly causing epidemics, spreading through camels and poultry. According to scientists, bats were the original SARS-CoV-2 virus , and there was also evidence that pangolins or snakes could be “guilty” of this.


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The article is written and prepared by our foreign editors from different countries around the world – material edited and published by Ordo News staff in our US newsroom press.