These numbers are reasonable, and they are consistent with the large numbers of deaths we have seen in NY. Another reason to believe that the prevalence numbers coming out of Stanford are overinflated. https://twitter.com/NYGovCuomo/status/1253352837255438338
For details on reasonableness of NY numbers, see e.g. this thread. https://twitter.com/trvrb/status/1253398325245603840?s=20