%0 Journal Article %A Gonçalves, G %A Machado, E %A Gouveia, E %A Santos, M. A. %A Castro, L %A Ricardo, A %A Gomes, G %T Resurgence of pertussis in northern Portugal: two severe cases in very young children %D 2005 %J Weekly releases (1997–2007) %V 10 %N 25 %P 2731 %R doi:https://doi.org/10.2807/esw.10.25.02731-en %K pertussis %U https://www.eurosurveillance.org/content/10.2807/esw.10.25.02731-en