Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
면역결여는 다양한 감염에 대한 취약성을 증가시킵니다.myeonyeokgyeollyeoneun dayanghan gamyeon-e daehan chwiakseong-eul jeunggasikimnida.Immunodeficiency increases vulnerability to various infections.