Circulation of Human Immunodeficiency Virus 1 A6 Variant in the Eastern Border of the European Union—Dynamics of the Virus Transmissions Between Poland and Ukraine. - Serwin, Karol; Chaillon, Antoine; Scheibe, Kaja; Urbańska, Anna; Aksak-Wąs, Bogusz; Ząbek, Piotr; Siwak, Ewa; Cielniak, Iwona; Jabłonowska, Elżbieta; Wójcik-Cichy, Kamila; Jakubowski, Paweł; Bociąga-Jasik, Monika; et al. (Clinical Infectious Diseases, 2023)