Abstract
Severe acute respiratory syndrome coronavirus 2 infection after coronavirus disease 2019 vaccination raises concerns about the emergence of vaccine escape variants. Here we characterize 14 breakthrough infections among 5860 fully vaccinated Dutch health care workers ≥14 days after the final dose of vaccination with either BNT162b2, mRNA-1273, or Ad26.COV2.S. These breakthrough infections presented with regular B.1.1.7 (Alpha) and B.1.617.2 (Delta) variants and high viral loads, despite normal vaccine-induced B- and T-cell immune responses detected by live virus neutralization assays and ELISpot. High-risk exposure settings, such as in households, indicate a potential risk of viral transmission despite full vaccination.
| Original language | English |
|---|---|
| Article number | ofab553 |
| Pages (from-to) | ofab553 |
| Journal | Open Forum Infectious Diseases |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jan 2022 |
| Externally published | Yes |
Keywords
- COVID-19
- SARS-CoV-2
- immunity
- postvaccination infection
- vaccine breakthrough
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