本文刊发在市场观察，作者查理·加西亚，R360创始人兼管理合伙人。R360是一个面向净资产超过1亿美元的家庭与个人的会员组织。他本人持有白银和黄金头寸。 白银价格周一遭遇重挫，但到了周四，这可能已经无关紧要。从1月1日起，中国将实施新的出口许可制度，政府将正式介入每年1.21亿盎司的白银出口。这意味着全球市场上60%至70%的精炼白银供应将必须获得北京批准，才能离开中国。 华尔街周一却将注...

Long COVID is an infection-associated chronic condition that typically occurs within 3 months of acute COVID-19 infection in which symptoms are intermittently or continuously present for at least 3 months. Long COVID is estimated to affect between 80 and 400 million people globally, with an incidence of 5–20% in the community and up to 50% among hospitalized patients following acute SARS-CoV-2 infection. Common neuropsychiatric and mental health symptoms of long COVID include memory deficits, executive dysfunction, anxiety, depression, recurring headaches, sleep disturbances, neuropathies, problems with taste and smell, and dizziness that accompanies erratic heart rates and severe post-exertional malaise. Underlying pathophysiological mechanisms includes SARS-CoV-2 viral persistence, herpesvirus reactivation, microbiota dysbiosis, autoimmunity, clotting and endothelial abnormalities, and chronic immune activation. Owing to the variability in the clinical presentation, management must b