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Vaccines are designed to provide controlled and mild exposure to a probable infection and prepare our immune system to better defend us when the real infection hits us.
For COVID-19,
the spike protein was used in vaccines to generate an immune response. Let’s
assume that the spike protein has multiple epitopes as shown above. Which out
of the listed B cells will be able to identify the antigen to produce
corresponding antibodies which can fight against the COVID-19 infection?