1646-706X 1646-706X S1646-706X2022000100009 10.48750/acv.340 Portugal Portugal Portugal Portugal 30 03 2022 30 03 2022 18 1 9 12

1 2013 2 Direção-Geral da Saúde 2015 3 2001 83 158-63 4 2004 5 180-7 5 2009 88 695-702 6 2009 30 1158-65 7 2014 19 8 Centers for Disease Control and Prevention 2020