There are several data points that are showing us that there may be an unexpectedly high number of people that get this disease and don't have any symptoms and show it.

A paper published showed that in China, up to 86% of people did not realize that they were sick or they were unreported. They had mild symptoms. If you take that high level, you take that low level.

All that means that the death rate from this virus is much-much lower, which means our policy decisions, based on a rather high death rate, might need to be adjusted.