covid-19 vaccine infection

People who have had COVID-19 may only need first mRNA shot

Stay informed with live updates on the current COVID-19 outbreak and visit our coronavirus hub for more advice on prevention and treatment.Previous investigations into how well the immune system responds to mRNA COVID-19 vaccines have mainly focused on the production of antibodies that can neutralize the SARS-CoV-2 virus.

However, this is only part of the story.In response to an infection or vaccination, the body not only produces antibodies but also generates long lived immune cells known as memory B cells.If the number of neutralizing antibodies in the bloodstream declines and they do not combat a new infection, memory B cells can step up to produce more antibody-producing cells.Memory B cells are also crucial for generating variations on.

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