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0:50 The variant was first identified in the United Kingdom late last year and arrived in the U.S. in December. So far, Arizona agencies have reported three positive samples. Jason Ladner, infectious disease expert at Northern Arizona University, says, I think it’s definitely something we need to continue to monitor very closely… From a public health perspective, this is important, because the more infectious a virus is, the more people need to be protected in order to achieve population-level immunity, often referred to as herd immunity. Herd immunity is achieved when enough people recover from COVID-19 or get vaccinated against it. Studies suggest currently approved vaccines do protect against the U.K. variant. But Ladner says over time the vaccines may need to be redesigned as the coronavirus continues to evolve. ....
First of all, what is an antibody and why is it important? Antibodies are proteins, they’re these Y shaped proteins, and they have these highly diverse binding sites at the tips of the fork of Y… But we’ve got a huge variety of antibodies that recognize different binding sites and that means these binding sites can recognize different proteins…. What they do is they recognize foreign antigens, foreign proteins, they bind to them and they prevent them from doing whatever is harmful for your body. … This study you were looking into cross-reactive antibodies, what does that mean? That means a single type of antibody with a particular type of binding site can bind to and recognize multiple different viral species or types of viruses. In this case, we’ve got what we call endemic coronaviruses. These are coronavirus that have been circulating within the human population for a while, they’re generally associated with pretty mild symptoms, kind of a common cold ....
Study: Coronavirus Activates Antibodies From Previous Coronavirus Infections This discovery could help in developing new therapeutic treatments. Individuals who have contracted the coronavirus have been found to rely on antibodies created during infections from earlier coronaviruses to help fight the disease, according to a new study conducted by Northern Arizona University and the Translational Genomics Research Institute (TGen). The research, published in the journal Cell Reports Medicine, noted that the coronavirus isn’t humanity’s first run-in with a coronavirus. In fact, before SARS-CoV-2 the virus that causes COVID-19 humans have been confronted with at least six other types of coronaviruses. ....
The differences in the pre-existing antibody response identified by this study may possibly explain some differences in how severely COVID-19 disease affects old versus young people. ....
Houston, January 23 People with Covid may rely on antibodies created during infections from earlier coronaviruses to help fight the disease, says a new study that may partially explain the difference ....