A person who is pre-diabetic would have higher than normal blood sugar levels but not high enough to be considered diabetic. If left uncontrolled, the blood sugar levels of a pre-diabetic might increase and develop into diabetes.
“快乐缺氧”(Happy Hypoxia)又称沉默低氧血症(Silent Hypoxia)是最近在新冠肺炎患者身上所察觉到的一种奇怪现象。这种低氧血症完全没有症状。
Hypoxia refers to very low oxygen levels in the blood. The normal oxygen saturation in the bloodstream of a healthy person is above 95%, but COVID-19 patients display dangerous declines of as less as 70%.