According to foreign media reports, by the end of 2020, Britain and South Africa confirmed the existence of two kinds of sars-cov-2 mutant viruses that caused local infection. Therefore, the most serious turning point of the new crown pandemic has appeared. B. 1.1.7 and b.1.351 both contain several mutations, one of which affects the spike protein that the virus uses to infect human cells.
Pfizer and biontech have tested the mutation in their vaccine and found that the antibody is still effective. They concluded in early studies that the vaccine was still effective against the two new strains. In addition, a new coronavirus mutation discovered by Japanese officials in early January was introduced into Japan from Brazil. The strain also had several genetic changes, including the same one as the British and African strains.
On Monday, local time, Dr. fudge told the Washington Post: "it's very likely that we have a more transmissible variant ourselves. We don't know. We are looking for it. If you look at the slope of our curve, it's very steep. It looks a bit like the British curve. "
Abcnews reported on Wednesday local time detailing some of the early findings by researchers at Ohio State University's Wexner medical center and Ohio medical school. Scientists have found two different genetic mutations in the United States. Dan Jones, deputy director of molecular pathology, told ABC: "so basically, these are two independent findings, both of which come from the sequencing of nasal swab genomes of positive patients."
The first strain was found in only one patient in Ohio. The mutation was identical to the British variant, but they concluded that the strain did not come from the UK or South Africa. Peter mohle, co-author of the study, pointed out that the virus strain in the United States is a natural or spontaneous mutation, which is likely to occur in the United States in the past 6-8 weeks.
This is the second more infectious virus they found. In three weeks at the end of December and the beginning of January, the new mutant virus became the "dominant virus" of Columbus. The mutation has three independent genetic changes, which have never been seen in a single sars-cov-2 strain before.
Jones told ABC: "this new Columbus strain has the same genetic backbone as the case we studied before, but these three mutations represent a significant evolution. We know that this shift is not coming from a branch of the virus in the UK or South Africa. "
Researchers will continue to study the mutation to determine its impact on the vaccine and whether the genetic change is likely to lead to more severe cases of covid-19.