[lmilcin]

It does not matter much whether the tests are 30% accurate. See... this is exponential growth. Due to its nature it will overrun any linear factors in a short time.

What if the reported Chinese numbers are only 30% of reality compared to US numbers? If you understood the nature of exponential growth you would know it will take just about 4 days for US to have three times the numbers China has.

It currently only takes US about 8 days to increase the number of cases tenfold (see here: https://www.worldometers.info/coronavirus/) which means 4 days to get 3 times increase.

What really matters is to get people to stop moving around and spreading the virus.