·新冠患者体重减轻是个很常见的症状，研究表明，新冠病毒感染会加剧脂肪从白色脂肪变成褐色脂肪，褐色脂肪可以让糖类和脂肪酸直接分解，不产生ATP，这被称为非颤抖性产热。研究人员让小鼠感染新冠后发现，感染新冠的小鼠在一周内体重下降了20%。因此感染新冠有助于脂肪组织萎缩，体重也会相应减轻。
·最新的XBB毒株，是一种重组病毒。是两种不同病毒的基因组被重组生成，不仅传播能力更强，还这意味着新冠变异的数量和特征比之前广泛。很可能结合两种变异毒株的优势，逃避免疫，并拥有更强的致病性。因此即使阳过，也不能掉以轻心。
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