Anti-vaxx propaganda has gone viral on Facebook. Pinterest has a cure

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.

Americans often want to connect to a cause beyond writing a check. Crowdsourcing is creating new forms of philanthropy globally, giving donors more choice and a stronger connection to the projects they fund.

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.

The 2008 recession’s job losses spurred a development of a Do-It-Yourself economy. With the advent of Uber, Etsy, Airbnb, and others, the marketplace has become full of micro-entrepreneurs who thrive with independent web-assisted businesses.

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.

Sexual assault, rape, and sexism are social problems that young women face and many feel powerless to create change. Non-profit organizations such as SPARK and WAM have trained teenage girls to be advocates for themselves. Online campaigns and social media have also made teenage girls feel empowered to express themselves and make social change.

Accessible affordable health care is needed for millions of uninsured Americans. The Affordable Care Act is a viable solution that helps the uninsured. Although the launching of the website had some glitches, many states designed their own insurance marketplace and have successfully signed up people for coverage.

Teenagers around the world are at risk of indoctrination by Islamic extremism and volunteering to fight for the Islamic state. Different European nations seek to make Islamic extremism unattractive to youth by bolstering surveillance efforts, internet outreach, and teaching the Islam of peace.

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.