The Importance of Antibody Titers in the Prevention of Infection

SARS-CoV-2 is different from dengue, Zika or West Nile virus. What made developing a vaccine against it so difficult? There are two main reasons: Antibody titers that naturally go down over time and how these viruses mutate. So we're always sort of in a push and pull trying to contain and prevent the continued spread of SARS- CoV-2.