Tuberculosis is still a rampant problem in the developing world. Doctors are looking for even more advanced ways to test for TB beyond the GeneXpert tests.

By partnering with cities across America, the 100,000 Homes campaign is going directly to the streets to end homelessness - and it’s working. With roughly 700,000 people in the United States experiencing homelessness, this organization seeks to address that using a tiered system that considers individual health needs as well.

Slow test results make it difficult to stop the spread of tuberculosis. Using faster diagnostic technology and driving vans to rural areas in Tanzania, GeneXpert is making progress in treating this curable disease.

Although patients go to hospitals to receive medical care, many Americans will acquire infections that did not already have them. The United States as a whole has made modest progress at reducing the rates of hospital-acquired infections. Spearheading the efforts, the Veterans Affairs Medical Centers have devised anti-MRSA strategies to keep patients safe.

For decades, AIDS has taken the lives of millions of people and infected millions more worldwide. The key to reducing the effect of AIDS, and even potentially curing it, involves treating patients as early as possible after being diagnosed with HIV, before the disease damages organs. San Francisco General Hospital developed the RAPID program for this purpose, with the goal of “Getting to Zero” the number of new infections and deaths.

New Orleans implemented an extraordinary 10-year plan that engaged unprecedented cross-sector collaboration between government, non-profit, and private entities to provide housing and housing services to the city's homeless veterans. The city's success in providing homes for every single veteran formerly on their streets motivated cities across the nation to tackle the crises using similar means, leading to a 1/3 decline veteran homelessness since 2010.

In Houston, TX, many individuals with mental illnesses cycled in and out of emergency care while arrested or incarcerated. Houston’s police department has decreased the number of incarcerated who have mental illness by opening a division to mental health called the Chronic Consumer Stabilization Unit. Now Milwaukee seeks to replicate Houston’s results.

The Homeless World Cup is the premier soccer tournament for homeless players. Programs around the world use soccer as a means of building a sense of community, sublimating negative energies, and encouraging personal growth.

In the developing world, intestinal worms stunt physical and mental growth, drain energy, and can inhibit school work for children. Deworm the World is a global campaign that lobbied the Delhi government to regularly distribute deworming pills to school children. The benefits decrease student absenteeism and increase cost-saving measures.

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.