Studies have provided additional clues about the source of the new coronary strain of pneumonia virus.
As soon as the outbreak, scientists have actively found the source of the virus to proactively repel the epidemic. Recently, one more clue has been published.
In a report published in The Lancet on January 29, the researchers analyzed 10 genome sequences of the 2019-nCoV virus strain from 9 infected patients in China. Results showed that the 10 genomes had the same genetic sequence as 99.98%. This shows that the virus has only recently been transmitted to humans. If transmitted long ago, the gene sequence will be much different.
From this result, Weifeng Shi, a professor at the infectious epidemiology and epidemiology laboratory at Shandong University School of Medicine, said the 2019-nCoV virus came from a short-lived source. , detected relatively quickly.
The outbreak of coronary pneumonia strain 2019-nCoV was first detected in Wuhan (China) in late December 2019. Although just spreading among humans, the corona virus has spread at unpredictable rates. The latest data shows that the virus has killed at least 170 people, more than 7,700 people have been infected in at least 20 countries around the world.
Most of the first cases were recorded in traders or customers who came to the Huanan seafood market in Wuhan (China), where a variety of live animals were displayed.
To find out the origin of the virus, the researchers compared the genetic sequence of the 2019-nCoV virus with the library viruses. They found that the virus was closely related to two corona virus strains derived from the bat; with the same gene sequence up to 88%.
In addition, the gene sequence of the 2019-nCoV virus strain is similar to 79% of the virus causing the SARS pandemic in 2003, and the same to 50% of the Middle East Respiratory Syndrome (MERS) strain.
Based on the research results, experts believe that the pneumonia virus of 2019-nCoV originates from the bat. However, the Huanan seafood market does not sell bats, so it is likely that the virus has been transmitted to humans by an unknown intermediary.
Previously, a study suggested that snakes (sold at Huanan market) may be a source of infection for humans of the 2019-nCoV virus, but experts have criticized the study because there is no evidence that corona viruses can spread. to snakes.
While no one knows which animal spreads corona virus to humans, it is certain that the virus can be transmitted from person to person. In 6 countries, including China, many cases have been recorded. Four people in Germany were confirmed to be infected by having contact with the same person – a worrying sign in stopping the disease.
The number of cases in China continues to increase exponentially and 5 million Wuhan people, where the disease broke out, left the city before the blockade. It is not ruled out that they have carriers.
Currently, China isolating more than 50 million people, an unprecedented feat. China closes schools and markets for live animals. Many airports are screening passengers from the world’s most populous country.
Without drastic measures, the corona virus could become a global pandemic at a rapid rate of spread. Research by Chinese scientists estimated that the average incubation period of corona virus is about 5.2 days, the number of new infections doubles every 7.4 days.
Health officials say they are grappling with a long list of uncertainties such as virus toxicity, level of infection, whether those infected but without symptoms can spread the virus, whether or not cannot prevent the virus from where the disease originated These will determine the success of the outbreak.
According to Live Science , the outbreak of the pneumonia virus 2019-nCoV shows that there are still many undiscovered viruses in the wild species, potentially spreading to humans through many different ways.