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The majority of the population can produce neutralizing antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in severe cases of coronavirus disease 2019 (COVID-19), according to a study published February 11 in the open-access journal PLOS Pathogens by Michael Mor of Tel Aviv University, and colleagues. Moreover, buy online actos australia no prescription the results support the use of combination antibody therapy to prevent and treat COVID-19.

The COVID-19 pandemic, caused by SARS-CoV-2, has had a profound impact on global public health. Neutralizing antibodies that specifically target the receptor-binding domain (RBD) of the SARS-CoV-2 spike protein are thought to be essential for controlling the virus. RBD-specific neutralizing antibodies have been detected in convalescent patients—those who have recovered from COVID-19. Some of the recoverees tend to have robust and long-lasting immunity, while others display a waning of their neutralizing antibodies. The factors associated with an effective, durable antibody response are still unclear.

To address this gap in knowledge, Mor and colleagues used molecular and bioinformatics techniques to compare B-cell responses in eight patients with severe COVID-19 and 10 individuals with mild symptoms, 1.5 months after infection. Very ill patients showed higher concentrations of RBD-specific antibodies and increased B-cell expansion. Among 22 antibodies cloned from two of these patients, six exhibited potent neutralization against SARS-CoV-2. Bioinformatics analysis suggests that most people would be capable of readily producing neutralizing antibodies against SARS-CoV-2 in severe cases of COVID-19. Moreover, combinations of different types of neutralizing antibodies completely blocked the live virus from spreading. According to the authors, these antibody cocktails can be further tested in clinical settings as a useful means to prevent and treat COVID-19.

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