This is a prospective, multi-center study within the U.S. Study participants will take part in two study visits a minimum of 14 days apart. During each visit, participants will self-collect capillary blood samples. Additionally, a healthcare provide will obtain capillary and venous serum samples. All capillary samples will be collected from the upper arm using the Tasso+ device paired with a commercially-available serum separator gel microtainer. The samples will be shipped to a clinical laboratory and tested for various analytes. Expected analyte values for each participant will be based on their venous sample results which will be compared to Tasso sample results

Inclusion Criteria:

1. Adults aged 18 - 85 years
2. Willing and able to provide written informed consent prior to study entry
3. Willing and able to adhere to study assessments, schedule, prohibitions and restrictions as described in the protocol
4. Healthy individuals or patients with analyte values (verified or likely to be) within intended clinical reference ranges as indicated by standard of care testing and/or past medical history (which may be documented or self-reported)

Exclusion Criteria:

1. Present with abnormal skin integrity or atypical skin health near/on arm collection sites
2. Mental or physical impairment which would preclude participation in the judgement of the investigator or qualified designee
3. Laboratory and healthcare personnel.
4. Any condition which, in the opinion of the Investigator or delegate, makes the participant unsuitable for this study (including, but not limited to, any mental or physical impairment which would preclude provision of adequate and knowledgeable consent)

Healthy individuals or patients with analyte values (verified or likely to be) within intended clinical reference ranges as indicated by standard of care testing and/or past medical history

Research results are proprietary; no sharing with other researchers is anticipated.