A RAND Corporation study looks at travel patterns to estimate “China’s reported COVID-19 caseload was undercounted by a factor of nearly 40.”
In fact based on outbound air passenger numbers, to have just an even (50/50) chance of COVID spreading to Japan, South Korea, Thailand, Taiwan, and the United States – as it had by January 22 – you’d need an infection rate 37 times greater than China officially reports.