Fig. 3

Kaplan–Meier curve assessing the effect of vaccination in incident cases. Only individuals with SARS-CoV-2 negative test in sample 1 were included in the analysis. Follow-up time was measured from donation of sample 1. All individuals included had a previous negative result in sample 1 and reported being vaccinated between sample1 and sample 2. Vaccination was wide available for people living with HIV since march 2021; all samples included in the analysis were obtained after vaccination