Reply letter about: factors associated with poor adherence to vaccination against hepatitis viruses, streptococcus pneumoniae and seasonal influenza in HIV-infected adults - Olga Tsachouridou; Adamantini Georgiou; Symeon Naoum; Dimitra Vasdeki; Maria Papagianni; Georgia Kotoreni; Evropi Forozidou; Paraskevi Tsoukra; Christiana Gogou; Dimitrios Chatzidimitriou; Lemonia Skoura; Pantelis Zebekakis; et al. (Taylor & Francis Group, 2019)