Please assess the completion status of the following clinical trial:

Trial Title: Vaccination Responses in Young and Older Adults

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: OTHER
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Participants ages 18 to 25 years old, or 55 and older, who have been diagnosed with asthma, other immune-compromising condition (e.g. Leukemia treated, Pulmonary disorders) or are healthy.~Exclusion Criteria:~* Subjects may not participate in this study if any of the following applies:~The potential subjects have already been vaccinated with PPSV23. Subjects have special risks attendant to venipuncture. Existence of any medical conditions that study investigators believe will interfere with the study participation or evaluation of results. This includes subjects on immunosuppressive medications and/or glucocorticoids.~Mental incapacity and/or cognitive impairment that would preclude adequate understanding of, or cooperation with, the study protocol.~For female participants: subjects will be excluded if pregnant. There are no known risks to pregnant women from the PPSV23 vaccine (also indicated in the Vaccine Information Statement (VIS) attachment provided to participants), and there is no additional risk associated with becoming pregnant during the study. However, as pregnancy affects immune system responses, this may affect the molecular readout in this study and introduce confounding factors in the analysis by the investigators. If a participant is already enrolled and becomes pregnant during this study, the investigators will temporarily withdraw them from the study from the day the participants become pregnant. If the participants would like to stay in the study, the investigators may continue their participation after their delivery.~If a participant has any severe allergies (life-threatening) or a participant has ever had a life-threatening allergic reaction after a dose of pneumococcal vaccine, or have a known severe allergy to any part of this vaccine, the participants will be advised not participate.~If a participant is not feeling well on the scheduled day of vaccination, the study coordinators will suggest waiting until the participants feel better. If the participant agrees, the vaccination will be rescheduled for a later date.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Healthy Young Adults (Type: None): Healthy young adults aged 18-25. Vaccination in all cohorts/groups.
- Asthma Young Adults (Type: None): Young adults aged 18-25 with asthma. Vaccination in all cohorts/groups.
- Immunocompromised Young Adults (Type: None): Young adults aged 18-25 that are immunocompromised (e.g. following treatment for leukemia).~Vaccination in all cohorts/groups.
- Healthy Older Adults (Type: None): Healthy older adults aged 55+ Vaccination in all cohorts/groups.
- Asthma Older Adults (Type: None): Older adults 55+ with asthma. Vaccination in all cohorts/groups.
- Immunocompromised Older Adults (Type: None): Older adults aged 55+ that are immunocompromised (e.g. following treatment for leukemia).~Vaccination in all cohorts/groups.

Based on this trial design, predict the completion outcome and termination type (if applicable).