A special type of antibody is produced in patients who have suffered from COVID-19, as well as less serious coronaviruses that cause colds.
American scientists have discovered a cross-reactive antibody to COVID-19 and other coronavirus infections that cause the common cold. This is stated in a message on the website of the Scripps Institution.
It is noted that the universal antibody was found in the study of blood samples collected before the pandemic, which were compared with samples of SARS-CoV-2.
The antibody also neutralized SARS-CoV-1, a coronavirus that causes SARS, an outbreak of which was observed in the early 2000s.
вЂњOur identification of a cross-reactive antibody against SARS-CoV-2 and more common coronaviruses is a promising development on the way to a broad-acting vaccine or therapy,вЂќ said one of the study's authors, immunologist Dennis Burton.
Scientists believe the antibody is produced by B-lymphocytes that вЂњrememberвЂќ the common cold coronavirus and activate when infected with SARS-CoV-2.
вЂњMemory B-cells are an important part of the immune system. They 'remember' initial disease threats and can circulate in the bloodstream for decades, ready to return to action if the threat occurs again.вЂќ
The antibody was found to bind mainly to the stable part of the spike protein of the coronavirus, which does not change much from strain to strain.
Scientists have previously found that after a mild course of COVID-19, those infected may retain protection against reinfection for years.