by Republic World

Healthcare workers’ IgG antibodies to SARS-CoV-2 remain constant, if not increasing, seven months after infection, according to a new study published in the journal Nature Communications on Friday, August 6.

Covid-19 could also be protected from by pre-existing antibodies against common cold coronaviruses, according to researchers at the Barcelona Institute for Global Health (ISGlobal) in Spain. It is critical to understand the dynamics and duration of immunity to SARS-CoV-2 in order to predict the pandemic’s evolution and develop effective strategies, they wrote.

The level of antibodies against different SARS-CoV-2 antigens was tracked over time in a sample of healthcare workers at the beginning of the pandemic. ISGlobal researcher Carlota Dobano, who led the study, said, “This is the first study that evaluates antibodies to such a large panel of SARS-CoV-2 antibodies over 7 months.” A total of 578 blood samples were collected between March and October 2020.

In addition, they examined the presence of antibodies against the four coronaviruses causing common colds in humans. They measured the amount and type of antibodies against six different SARS-CoV-2 antigens. Antibodies’ neutralising activity was also examined in collaboration with researchers from Barcelona University.

 

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Most infections during the first covid wave

Health care workers were infected most frequently during the first pandemic wave, according to the study’s findings. As a result of this, other recent studies have confirmed that all IgG antibodies, with the exception of those directed against nucleocapsid (N), remain stable over time. All body fluids and tissues contain Immunoglobulin G (IgG), the most abundant form of the antibody. These antibodies are produced towards the end of the infection process and they are vital for the body’s recovery.

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