The Investigators are running a small, early-phase research study across several hospitals in Melbourne, Australia. The study will involve up to 100 young adults between the ages of 18 and 55 who have had a stroke. The goal is to test how practical it is to carry out a detailed health assessment process-called "deep phenotyping"-with this group.

This process involves collecting a wide range of information and samples from stroke survivors to better understand each participant's condition. The Investigators will look at how well this approach works in practice, including how easy it is to use, whether it's done consistently, and how acceptable it is to participants.

At the same time, the Investigators will also explore how different factors-such as biological markers (biomarkers), age, sex, type of stroke, lifestyle, and environment-might be related to stroke recovery. This pilot study will prepare for larger studies in the future.

Inclusion Criteria:

1. Between 18 and 55 years.
2. Within one month of acute stroke confirmed with standard of care brain imaging or clinical diagnosis or for those for whom recruitment <1 month of stroke is not possible they may be recruited to participate within 3-months of stroke

Exclusion Criteria:

1. Severe, intercurrent or progressive illness likely to EITHER

   1. Have a prognosis for survival under 24 months; OR
   2. In the opinion of the investigator will mask the importance to the individual participant data (e.g. severe MS, dementia, etc)

2. Major psychiatric condition requiring medical intervention

Young adult stroke survivors within 3 months of stroke

Sharing of individual patient data will be considered upon reasonable request by qualified researchers with appropriate IRB/HREC approval