Intensive care case mix and activity; this is the weekly COVID-only version of ICNC dataset. Includes information preceding admission to intensive care e.g. date of hospital admission, and information about min and max values of critical indicator (e.g. lowest heart rate, highest serum glucose). ICCD was a project specific dataset for specific COVID-19 related projects only, which is not currently available to request. However, the ICNC dataset is still available.