I have been looking at AWS Health DataLake which just went GA for parts of the world, there is potential but more is needed, it is based on HL7 FIHR (a great standard almost no-one uses) with no translation tools from HL7 V2.x ( a terrible ‘loose’ standard that almost everyone uses). No good searching/analysing data pipeline solution and low message number capabilities – 10 messages a second. This is only really useful for reviewing an existing data set, not any sort of real time feed from a major pathology LIS or hospital PAS.
At least today, Google’s Cloud product, HealthCare, is far more complete. Amazon tends to improve things pretty quickly though so it is definitely worth watching.