Treatment happens at home. Half of it never does.

Adherence to chronic-disease treatment is 50% in developed countries. Lisa's agents exist in the space between one appointment and the next.

BY Lisa Intelligence · PUBLISHED November 13, 2026 · 2 min read

UPDATED November 13, 2026

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Cobalt line illustration: a pill capsule, the treatment-plan line loosening midway, resumed with follow-up markers up to a heart, with an orange dot. — The treatment plan leaves the appointment with the patient — and half of it is lost at home (WHO, 2003)., Lisa Discovery

EXECUTIVE SUMMARY

Adherence to long-term therapy for chronic diseases averages only 50% in developed countries (WHO, 2003).
In Sudan, 96% of adherent patients had blood pressure under control, versus 18% of non-adherent patients.
The WHO is clear: the patient is not to blame — health systems were not designed to provide behavioural support.
Lisa's agents follow the plan between appointments: reminders, simple answers, and human escalation with the case summarized.

The appointment ends, the prescription is printed or sent, and the treatment begins at that moment — far from any professional. It is at home that the patient takes the medication at the right time, keeps the plan going for months, notices the side effect and decides whether to continue. And it is at home that, most of the time, the plan quietly dies.

The World Health Organization measured the size of this in the report "Adherence to long-term therapies: evidence for action". In developed countries, adherence to long-term therapy among patients with chronic diseases averages only 50%. In developing countries, it is lower still. For hypertension, the cited figures range from 27% in Gambia to 43% in China and 51% in the United States.

The contrast the WHO records is brutal: in a study in Sudan, 96% of patients who followed their treatment had their blood pressure under control. Among those who did not, 18%.

The patient is not to blame

The WHO report is explicit: patients are blamed too often for not following treatment, when the evidence shows that providers and health systems enormously influence adherence behaviour — and were never designed for it. The care team hands over the plan and disappears. The patient is left alone with a new routine, doubts that surface in the middle of the night, and a silent question: "is this worth it?"

The right question is not "why does the patient give up?". It is "who stayed with them after the appointment ended?".

What Lisa's agents do in that interval

A care plan should not depend on the patient's memory, willpower or luck. Lisa's agents exist precisely in that space between one encounter with the care team and the next.

METHOD

With the patient's consent and within the plan defined by the care team, the agent does the follow-up no human schedule can scale: it checks how the treatment is going, reminds what needs to be remembered at the right time, answers the simple question before it turns into abandonment — and, when it spots something that calls for clinical judgment, escalates to a human with the case summarized. Nothing is sent without review: every output is born a draft until human approval.