Delta side, two days of time difference, spreading more.
Scientific journal Nature reported on the 19th that people infected with the COVID 19 delta mutation have been investigated to spread the virus to more people because symptoms are revealed only two days after the infection.
Benjamin Cowling, a research team at the University of Hong Kong’s Public Health University, analyzed data on 101 people infected with delta mutations in Guangdong Province and their close contacts from May to June this year. Cowling found that they began to show symptoms 5.8 days after contracting the Delta virus, or 1.8 days after testing positive for the virus RNA. They spread the delta virus for two days without even realizing it.
Previous studies and Cowling’s conclusion were that if a delta mutation contracted the previous COVIDvirus, it would take an average of 6.3 days for symptoms to occur, and 5.5 days for a positive for viral RNA. If it takes 0.8 days for symptoms to appear even after contracting the common COVIDvirus, the delta mutation will be 1.8 days, more than double the time difference. In the end, delta mutations result in more virus spread through 1.8 days of time difference attacks.
According to a study released last month by the Center for Disease Control and Prevention in Guangzhou, China, delta mutations have more than 1,000 times higher particle density in the human body than the previous COVIDvirus. Professor Cowling also said, “Somehow, the virus has increased at a faster rate, and it is much higher in quantity.”
In the study, 74 percent of delta mutations occurred in the pre-symptory stage. This was a higher percentage of any previous mutation. Dr. Banabi Young, an infectious disease specialist at the Singapore National Center for Infectious Diseases, said, “It helps explain whether delta mutations have become dominant species after defeating the original virus and other mutations.”
Delta mutations are also 1.5 to 3 times higher than those of the COVIDvirus and other mutations in the R0 value (basic reproduction index and the number of people infected by one person). According to Professor Mom Kilpatrick, an infectious disease researcher at the University of California’s Santa Cruz campus, the delta mutation had an R0 value of 6.4, while the previous COVIDvirus had an R0 value of 2-4.
In this study, vaccinators have a 65% lower chance of infection than non-vaccinated people. Even though the vaccination was completed, a few cases of breakthrough infection were reported. However, they found that the amount of viruses detected was relatively small. “The effects of the vaccine have also been reaffirmed in this study,” Dr. Young said. The study was released on the pre-release site of medical papers “medRxiv” on the 13th and has yet to undergo peer review.