2023, ' Effectiveness of BNT162b2 COVID-19 vaccination in prevention of hospitalisations and severe disease in adults with SARS-CoV-2 Delta (B.1.617.2) and Omicron (B.1.1.529) variant between June 2021 and July 2022 : A prospective test negative case-control study ', The Lancet Regional Health-Europe, vol. 25, 100552, pp. 1-13 . https://doi.org/10.1016/j.lanepe.2022.100552, https://doi.org/10.1016/j.lanepe.2022.100552
The Lancet. Infectious Diseases Hyams, C, Marlow, R D, Maseko, Z, King, J N, Ward, L, Fox, K, Heath, R, Turner, A, Friedrich, Z, Morrison, L, Ruffino, G, Antico, R S, Adegbite, D S, Szasz-Benczur, Z, Garcia Gonzalez, M, Oliver, J L, Danon, L & Finn, A H R 2021, ' Effectiveness of BNT162b2 and ChAdOx1 nCoV-19 COVID-19 vaccination at preventing hospitalisations in people aged at least 80 years : a test-negative, case-control study ', The Lancet Infectious Diseases, vol. 21, no. 11, pp. 1539-1548 . https://doi.org/10.1016/S1473-3099(21)00330-3