Nationwide surveillance system to evaluate hospital-acquired COVID-19 in Brazilian hospitals - Costa, M. Machado de Miranda; Guedes, A. R.; Nogueira, M. D. S. P.; Oliveira, L. S. C.; Barros, L. de Souza; Goncalves, M. R. S.; Carvalho, A. A.; Moura, H. L. C. Amaral de; Levin, Anna Sara Shafferman; Oliveira, M. S. (Journal of hospital infection, 2022)