Yes. The shingles vaccine is effective, which is hopeful for SARS CoV 2. Usually immune escape comes from either mutation of the virion, or waning of the immune system itself, for any number of reasons (senescence, time, stress, externalities like chemotherapy).
And from what little I know, SARS CoV 2 doesn't appear to mutate rapidly so it should be a good target for a durable immune response, whether it be in convalescent patients (who beat the infection) or vaccinated patients (assuming - big if - the vaccine is effective). Theoretically. But I always temper my optimism with the knowledge that biology is usually more complicated than we assume mechanistically.
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