@article{Marques_2021, place={Lisbon, Portugal}, title={The EU Digital COVID Certificate: Should We Differentiate Between Previously Infected and Fully Vaccinated People?}, volume={34}, url={https://actamedicaportuguesa.com/revista/index.php/amp/article/view/16830}, DOI={10.20344/amp.16830}, abstractNote={N/a.}, number={11}, journal={Acta Médica Portuguesa}, author={Marques, José Gonçalo}, year={2021}, month={Nov.}, pages={803–804} }