A new paper, published in Science at 3pm this afternoon, looks at the immune responses in UK healthcare workers following their first dose of the Pfizer/BioNTech vaccine and their level of protection against as the Kent and South Africa variants, depending on whether they had previously had SARS-CoV-2 infection.
The researchers looked an antibodies, T cells and B cells.
Journalists dialled in to this briefing to hear from the authors of the study and to ask them any questions.
Prof Rosemary Boyton, Professor of Immunology and Respiratory Medicine, Imperial College London
Prof Danny Altmann, Professor of Immunology, Imperial College London