Presumed Protective Role for Anti-Hepatitis B Virus Antibodies Against COVID-19 Severe Cases: A Clinical Study Confirming in silico Hypothesis oleh Mariem Gdoura, Mariem Gdoura, Mariem Gdoura, Raoua Touati, Raoua Touati, Sana Kalthoum, Rania Ben Slama, Rania Ben Slama, Nouel Fatnassi, Nouel Fatnassi, Mehdi Mrad, Lamia Ammari, Lamia Ammari, Nozha Brahmi, Amira Ben Jazia, Nahed Hogga, Nahed Hogga, Henda Triki, Henda Triki, Sondes Haddad-Boubaker, Sondes Haddad-Boubaker