Strength and durability of antibody responses to BNT162b2 and CoronaVac

Vaccine. 2022 Jul 30;40(32):4312-4317. doi: 10.1016/j.vaccine.2022.05.033. Epub 2022 Jun 11.

Abstract

We studied 2780 adults in Hong Kong who received CoronaVac inactivated virus vaccine (Sinovac) and BNT162b2 mRNA vaccine ("Comirnaty", BioNTech/Fosun Pharma). We compared rates of antibody waning over time using an enzyme-linked immunosorbent assay for spike receptor binding domain and a surrogate virus neutralization test. We found stronger and more durable antibody responses to two doses of the mRNA vaccine, and slightly stronger initial antibody responses to each vaccine in younger adults and women. The weaker and less durable responses following CoronaVac support earlier provision of third doses to persons who previously received two doses of this vaccine.

Keywords: Antibodies; COVID-19; Vaccination.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, N.I.H., Extramural

MeSH terms

  • Adult
  • Antibodies, Viral
  • Antibody Formation*
  • BNT162 Vaccine*
  • COVID-19 Vaccines
  • Female
  • Humans
  • Vaccines, Synthetic
  • mRNA Vaccines

Substances

  • Antibodies, Viral
  • COVID-19 Vaccines
  • Vaccines, Synthetic
  • mRNA Vaccines
  • BNT162 Vaccine