Abrantes, RicardoPimentel, VictorSebastião, CruzMiranda, Mafalda N. S.Seabra, SofiaSilva, Ana RitaDiniz, AntónioAscenção, BiancaPiñeiro, CarmelaKoch, CarmoRodrigues, CatarinaCaldas, CátiaMorais, CéliaFaria, DomitíliaSilva, Elisabete Gomes daTeófilo, EugénioMonteiro, FátimaRoxo, FaustoMaltez, FernandoRodrigues, FernandoGaião, GuilherminaRamos, HelenaCosta, InêsDiogo, IsabelGermano, IsabelSimões, JoanaOliveira, JoaquimFerreira, JoséPoças, JoséCunha, José Saraiva daSoares, JorgeMansinho, KamalPedro, LilianaAleixo, Maria JoãoGonçalves, Maria JoãoManata, Maria JoséMouro, MargaridaSerrado, MargaridaCaixeiro, MicaelaMarques, NunoCosta, OlgaPacheco, PatríciaProença, PaulaRodrigues, PauloPinho, RaquelTavares, RaquelAbreu, Ricardo Correia deReal, Rita CôrteSerrão, RosárioCastro, Rui Sarmento eNunes, SofiaFaria, TeloBaptista, TeresaSimões, DanielMendão, LuisMartins, M. Rosário O.Gomes, PerpétuaPingarilho, MartaAbecasis, Ana B.2025-05-232025-05-232025-061201-9712http://hdl.handle.net/10400.1/27156In the EU/EEA, men who have sex with men (MSM) is a priority group for the prevention and control of HIV-1 infection. In Portugal, the 2023 HIV incidence rate was 8.2 per 100,000 inhabitants, with 876 new infections, 41.7% in MSM. We aim to characterize HIV-1 transmission clusters (TC) and transmitted drug resistance (TDR) and its sociodemographic, behavioral, clinical, and viral genomic determinants in MSM newly diagnosed in Portugal between 2014 and 2019.engHIV-1Men who have sex with menPortugalTransmission clusterDrug resistancejournal article10.1016/j.ijid.2025.107888