Vaccination is effective in preventing severe COVID-19 symptoms. Here the authors monitor patients with hematopoietic malignancy to find the third dose of the mRNA vaccine, BNT162b2, only boosts the humoral immunity in those showing responses to 2nd dose vaccination but can induce an independent T-cell response in a fraction of seronegative patients.
- Daniel Re
- Barbara Seitz-Polski
- Jérôme Barrière