Effect of COVID 19 vaccination on the CT severity score for SARS CoV2 pneumonia- an experience from the initial wave. Braz. J. Radiat. Sci. [Internet]. 3 de julio de 2023 [citado 17 de julio de 2025];11(3):1-11. Disponible en: https://bjrs.org.br/revista/index.php/REVISTA/article/view/2279