I like the new Discovery search, where if you ask for the search only to be done within the ADM101 series, gives you very directed results.
The amount of detail varies between journals but you usually get the date of sick call, the name, the age and what illness they presented with. You also get a description of the treatment given, this may be only a few lines or go on for pages.
The Journals are also a fascinating glimpse into conditions aboard the ships and also the general health of the convicts compared to the Irish emigrants compared to the Naval seamen.
These journals are a fantastic resource for family, social and medical historians. I can see many hours ahead looking at the medical terminology used and some of the interesting treatments, many of which we would shudder at today.