Because there is as yet no comprehensive system for testing for antibodies, the national infection rate-the number that experts are most interested in-remains a mystery. "Since we don't really know how many people have been infected nationwide, how can we calculate the rate of fatalities?"
由於大規模的抗體檢測試劑尚未發展成熟，專家學者最好奇的全民感染率一直是個未知數，「既然不知道全國感染者的確實人數有多少，又如何估計死亡率？」