So some comments here say 60-70% global infection [0] and 3-4% death rate [1]. Is this really possible? That would be like ~150 million deaths.
If we manage to keep it from spreading too far too fast, from the variety of studies I've seen then anywhere from .5% to 1% is probably more realistic. But if we don't, expect something higher. This is why waiting for "enough" people to die as evidence of severity, then responding is a poor response.
FWIW the Spanish Flu infected 27% of the world's population. 60-70% seems really high.