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The Wall Street Journal published a list of twenty health advances to be thankful for. Here are some highlights:

Around the world, 27% fewer children died before their fifth birthday in 2007 than in 1990, due to greater use of insecticide-treated mosquito nets, better rehydration for diarrhea, and better access to clean water, sanitation and vaccines.

As of this month, 71% of the U.S. population lives under either a state or local ban on smoking in workplaces and/or restaurants and/or bars, and 19 states have banned smoking in all three kinds of places. Research has found that air quality improves and heart-attack rates drop in areas that have enacted smoking bans.

Chalk this one up as an advance for mental health: The U.S. divorce rate dropped by one-third from 1981 to 2008, and is at its lowest level since 1970. This may be due to more couples postponing marriage or to economic constraints, as well as to couples’ determination to stay together.

More news and tips to improve your health.