title: [Seasonal variations in HBsAg detection in blood donors].
mesh_terms: D001782:Blood Donors; D002353:Carrier State / Q000276:immunology*; D006509:Hepatitis B / Q000276:immunology*; D006514:Hepatitis B Surface Antigens / Q000302:isolation & purification*; D006801:Humans; D011044:Poland; D012621:Seasons
chemical_list: D006514:Hepatitis B Surface Antigens
vernacular_title: Sezonowość wykrywalności antygenu HBs u krwiodawców.