On average 25,000 people die every day in developing countries for want of basic medicines that cost less than a cup of coffee. Most of the victims are under five. 70% of childhood illness and death is caused by a short list of diseases which are inexpensively treatable and preventable. A HS patient is typically a lower income rural farmer. Currently HS sites are in small, rural market centers serving populations between 5,000 and 10,000 people, with a density of 500 people or more per sq km. The HealthStore targets villages with inadequate access to essential medicines, underserved by the existing public and private health infrastructure. HS measures access based on proximity, affordability, quality and consistency of in-stock availability. In Kenya, 56% of the population lives more than an hour away from a health facility. Even where drugs are available, they are too often overpriced, of poor quality or given inappropriately. Drug shortages at public facilities are a chronic problem throughout Kenya. It is common for rural villagers to spend a full day and up to $2 in transport to a government dispensary only to find, after waiting in a long line, that vital prescriptions are unavailable. Studies show that private independent drug sellers often stock counterfeit or out of date medicines and rarely provide competent diagnoses.