{Reference Type}: Journal Article
{Title}: Ongoing outbreak of hepatitis A associated with sexual transmission among men who have sex with men, Portugal, October 2023 to April 2024.
{Author}: Rosendal E;von Schreeb S;Gomes A;Lino S;Grau-Pujol B;Magalhães S;Ricoca Peixoto V;Roque C;Moreno J;Maltez F;Almeida F;Sá Machado R;Marinho RT;Vasconcelos P;de Sousa R;Vieira Martins J;
{Journal}: Euro Surveill
{Volume}: 29
{Issue}: 21
{Year}: 2024 May
{Factor}: 21.286
{DOI}: 1560-7917.ES.2024.29.21.2400272
{Abstract}: An outbreak of hepatitis A is ongoing in Portugal, with 71 confirmed cases from 7 October 2023 to 24 April 2024. Most cases are male, aged 18-44 years, with many identifying as men who have sex with men (MSM) and reported as suspected sexual transmission. Phylogenetic analysis identified the subgenotype IA, VRD 521-2016 strain, last observed in an MSM-associated multi-country outbreak in 2016 to 2018. We wish to alert colleagues in other countries to investigate potential similar spread.