$翰宇药业(SZ300199)$President Biden, 81, tests positive for COVID. For older people, the disease is still serious.Updated Wed, July 17, 2024 at 4:06 PM PDT·4 min read81 岁的拜登总统新冠病毒检测呈阳性。对于老年人来说，这种疾病仍然很严重。