The COVID-19 Vaccine Response Screen measures only the antibody response to the S-RBD, or spike protein. Once the baseline immune response has been established, this test can be used post-vaccination to evaluate immune status. The average time for seroconversion has been estimated at 2-3 weeks. However, the strongest antibody responses will likely be seen after the second vaccine dose 6-8 weeks after the first inoculation.
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