Increased Infectivity of Coronavirus

Increased Infectivity

Increased Infectivity of Coronavirus being discovered by scientists

July 12, 2020

Coronavirus has become more contagious – by almost a third – due to a DNA mutation of the strain, according to Hong Kong scientists.

As of July 12, 2020, 12,711,496 patients with Coronavirus have been detected around the world, the increase per day was 215,965 cases, and 567,535 deaths were recorded over the last day, the increase was 4,826 cases.

All citizens, and especially those at risk (elderly, people with chronic diseases), are advised to minimize visits to public places, observe personal hygiene rules, and if they feel unwell, stay at home and seek medical help.

Now, each COVID carrier can transmit the infection to four more people, from the earlier model of only two or three people. Shortly before, the growth of Coronavirus’s infectiousness was confirmed by the mathematical model; the virus of today begins to penetrate the cell more efficiently and overcome defense mechanisms present throughout the human body.

New DNA mutations led to a 30% increase in the new type of Coronavirus’s infectivity, said Gabriel Leung, Dean of the University of Hong Kong Medical School. Every person infected with Coronavirus can transmit the infection to four others, said the scientist who is advising authorities about the pandemic. Moreover, in March, one COVID carrier could infect 2.5–3 people. 

The chief infectious disease specialist in the USA, director of the National Institute of Allergic and Infectious Diseases, Anthony Fauci, earlier admitted that Coronavirus could mutate, and its virulence could increase.

At the same time, he noted that science could not accurately say whether the virus becomes more dangerous due to a mutation, causing more severe health problems.

Russian scientists also confirm the growth of Coronavirus’s infectiousness – the mathematical model built in Novosibirsk testifies to this hypothesis.

“Mutation of the virus increased the efficiency of its penetration into the cell, overcoming the corresponding cellular barriers and defense mechanisms, which leads to an increase in infectivity by 2.5-8 times,” 

Scientists also note that mortality from coronavirus infection is falling – now the figures are 2-3% compared to 10% of those who died at the beginning of the pandemic.

In total, six varieties of Coronavirus are found in the world – scientists achieved such results by analyzing 10.4 thousand of its strains. The coronavirus mutation rate resembles that of ordinary flu. Simultaneously, the high infectivity of Coronavirus is its most dangerous property, a Chinese virologist, Professor Zhong Nanshan, stated in May 2020. 

COVID is transmitted from person to person more quickly than seasonal flu and spreads faster than Middle Eastern Respiratory Syndrome (MERS).

On May 17, the head of Rospotrebnadzor Anna Popova warned the residents of Russia that everyone would have to live in a pandemic of the Coronavirus in the summer and longer.

Coronavirus is transmitted by airborne droplets – at a distance of 1−2 meters. Also, you can become infected by touching your eyes with dirty hands. The main symptoms are dry cough, shortness of breath, up to respiratory failure, fever, weakness. Sometimes the disease goes away without pneumonia; it is only accompanied by a rare dry cough and a low temperature – but the person does not become less contagious.

Scientists from the German University of Bonn established the most likely route of transmission of coronavirus infection. Virologists experimented: they took samples from door handles and other objects. They tried to cultivate the virus in the laboratory but found no signs of the live virus in the samples. It became clear that the scenario of transmission increased through contact with objects is unlikely.

Experts found that severe outbreaks of Coronavirus were recorded after mass events. Thus, the most likely way to transmit the disease is directly through close contact with the infected.