Here are 10 of the countries with the worst problems with water quality in 2017.
World Water Day is held on 22 March to raise awareness of the importance of freshwater.
Two signalling proteins that help cancer cells resist chemotherapy could be targeted by treatments.
Study from University of Arizona says you will not catch anything from a toilet even with seat uncovered.
More than 650 million people, or 10% of the world's population, do not have access to safe water, putting them at risk of infectious diseases and premature death.
British medicines regulator warned healthcare professionals about risks of paraffin in creams in 2008.
Researchers linked spontaneous coronary heart disease to emotional stress.
Testosterone therapy has shown positive results in trials to help women with sexual dysfunction.
NOx gases are pollutants, but can be used in chemical processes to create nitrogen-containing drugs.
'The modern world brings with it stresses we would not have imagined 50 years ago,' Dr. Lucy Donaldson said.
New measure could delay new drugs being made available on NHS by as long as 3 years.
Clinic recruited patients desperate for care and charged them for treatment with little basis in evidence.
Whole-body vibration tested for its benefits in mice and could have implications for human health.
The findings suggest a potential cure might one day be on the horizon.
More research will now be needed to study if variant makes people more susceptible to Alzheimer's.
700 people have died from malaria so far this year as growing food insecurity linked to spread.
People still follow orders against their will and inflict pain on another person when told to by an authority figure.
Gambling frequently occurs alongside other addictive behaviours such as drug use and heavy drinking.
The poster girl is a happy white woman making a childless couple happy, but the truth is far less palatable.
In some cultures, marriages between cousins are frequent and benefit the bride and groom's parents.
Cobra venom can destroy whole limbs. Now scientists want to turn it against cancer cells.
The findings highlight the importance of immunotherapy right after an infection to control the virus.
People with HIV may suffer from cognitive problems directly tied to presence of virus in the brain.
"I would have loved to be the president who presided over the end of cancer as we know it," Biden said.
Making the synthetic drug illegal has only pushed it underground.
Finding out whether coffee is good or bad for you can be confusing.
The test can be used as an initial indicator to see if someone's porn consumption is likely to be problematic.
Many people – youth in particular – say they turn to porn to find answers about sex.
Little-studied structures called dendrites turn out to be the overwhelming source of the brain's activity.
Porn4PrEP wants to use porn, to teach people about sexual health.