Barcelona’s Superblock model reclaims street space from through-traffic for walking, gathering, greenery and local activity. Evaluations of early Superblocks found improved perceived well-being, tranquillity and sleep, increased social interaction, lower traffic volumes and better local air-quality measures. A citywide health-impact model estimated much larger potential gains if the approach were implemented broadly. The evidence also shows that the same intervention can perform differently from one block to another.

The Friendship Bench model trains supervised lay health workers to deliver structured problem-solving therapy close to primary-care clinics and communities. In a randomized clinical trial in Zimbabwe, participants receiving the intervention had substantially lower symptoms of common mental disorders, depression and anxiety at six months than the control group. The model works because it uses local language, trusted community workers, clear treatment protocols and referral for people who need more specialized care.

Finland became widely known for a long period in which homelessness declined while Housing First expanded permanent homes and support. The model begins with stable housing and then connects people to services rather than requiring sobriety, employment or treatment milestones before a home is offered. But national homelessness increased again in 2024 and 2025, with authorities citing shortages of small affordable homes, higher living costs and weaker income supports. That reversal is an important systems lesson: a strong service model cannot compensate indefinitely for an insufficient supply of affordable housing.

Brazil’s Family Health Strategy integrates public health and primary care through multidisciplinary teams supported by community health workers. The World Health Organization highlights how community health workers extend the reach of teams, help identify local health needs and support public-health action. The model changes the basic geography of care: instead of waiting for people to arrive sick at institutions, the health system develops an ongoing relationship with families and neighborhoods.

Buurtzorg organizes home nursing around small self-managing teams that coordinate care close to patients. Evaluations of adapted versions found strong acceptability among patients, carers and clinicians, with particular advantages in continuity, responsiveness and support for multiple physical, mental and social needs. Evidence on total system cost is more mixed and context dependent. The central lesson is that care quality can improve when skilled caregivers have enough autonomy and time to understand the whole person.

Geisinger’s Fresh Food Farmacy provides food-insecure patients with diet-responsive conditions enough nutritious food for household meals plus diabetes education and a clinical support team. The program reports improvements in measures such as blood sugar, blood pressure and cholesterol among participants, and has served thousands of patients and family members. Its larger significance is conceptual: clinicians cannot prescribe healthy eating successfully if healthy food is not actually available or affordable.

New York City’s Active Design work treats the built environment as a public-health tool, while newer Universal Design initiatives aim to make public spaces and projects usable by people with a wide range of abilities from the start. The city’s disability-access planning includes physical access, communication access and inclusive public-realm design. This is less a single proven intervention than a systems shift: accessibility is moving upstream into planning and procurement instead of being treated only as a retrofit after exclusion occurs.