With just a photo of your fingernail, your phone can now tell if you have anemia

A few adult children have found that the simplest arrangement can be found in an apartment at the same retirement community, as it enables them to care for their elderly parents efficiently.

Project ECHO - driven by a single doctor with a cause - pulled together a team of specialists to develop a model that combines technology with collaborative care and careful patient tracking to help cure for diseases spread to patients around the world through community healthcare agents, as opposed to only specialty centers. This kind of "disruptive innovation" is effectively working to demonopolize health care knowledge and access, and lends to a health system capable of meeting today’s soaring demands for care.

A new approach to distributing pharmaceuticals in Egypt could become the blueprint for providing cutting-edge medicines to the poor. The approach, developed to fight Hep. C, capitalizes on local networks and involves negotiating lower prices with drug companies.

In light of a study published in BMC Medicine, authors Nancy Fullman and Alexandra Wollum take a deeper dive into Nigeria’s gains against polio and what they could mean for the country’s routine vaccine systems.

PrePex, a new nonsurgical circumcision tool, could revolutionize the prevention of H.I.V. and AIDS in sub-Saharan Africa. Cheap and easy to assemble, the device has proven successful in several randomized trials.

The Jaipur Limb organization based in India has developed prostheses at low cost, and services are free for the poor. The organization’s efforts have recently spread to other countries with impoverished people. Jaipur Limb reaches patients through branch clinics, traveling workshops, and limb camps in cities around the world.

A prosthetist from Texas visiting Jaipur Limb workshops in Honduras saw problems with their low-cost prosthetics - the issue wasn't the design of the leg, but the technicians at the Honduras workshops were people completely new to prosthetics who were given just eight weeks of training. Thanks to his research, Jaipur established a research and development unit to improve the limb.

The U.S. prison population is aging, which is costly because older inmates need more care. Some states have responded by creating special wards, having the young inmates care for the old, or building nursing homes.

Many different people are inventing health devices for resource-poor settings, but some organizations - like M.I.T.’s Little Devices group - are empowering developing communities and increasing access to healthcare by building medical devices that nurses and doctors in very poor settings can adapt themselves — or kits for making their own, often harvesting parts from toys to cleverly rig up medical equipment. It’s part of a major idea shift, one that’s transforming the design of foreign aid.

Two columns on how Iran is treating its massive epidemic of injecting drug use by tackling it as a health problem, effectively lowering H.I.V. rates among drug users using an approach to drugs known as harm reduction.