As stricter EU regulations come into force next year, Tonight investigates the quality of the bathing water on Britain's beaches.
An infectious diseases doctor who contracted the Ebola virus at work in Guinea has spoken to ITV News about beating the disease.
A survey has shown how "addictive" apps on smartphones are taking control in British bedrooms
There needs to be a "revolution" in societal attitudes towards organ donation so more lives can be saved, the NHS Blood and Transplant (NHS BT) has said.
The proportion of families who agree to organ donation after the death of a family member remains "stubbornly low", NHS BT spokeswoman Sally Johnson said.
Figures show that during 2013/14, more than four in 10 families approached about organ donation said no to donating a loved one's organs.
"Family refusal is our biggest problem and it's sad we lag so far behind some other countries in terms of consent/authorisation rates to donation," she added.
More people are donating their organs in Britain than ever, according to health officials
The last financial year was a "record year" for organ donation and transplantation in the UK, NHS Blood and Transplant (NHS BT) has said.
In 2013/14 there were 4,655 transplants carried out - a 10% rise on the previous year, a spokeswoman said.
New figures, published by the authority to mark National Transplant Week, show that almost one in four of the transplants were organs from "living donors".
The remainder of organ donations came after a death.
Bipolar disorder, known in the past as manic depression, is a condition that affects people's moods, which can swing from one extreme to another.
People with bipolar disorder have periods of:
- Depression - where they feel very low and lethargic
- Mania - where they feel very high and overactive
- Les severe mania is known as hypomania
The exact causes of bipolar disorder are unknown and it is relatively common - around one person in 100 is diagnosed with the condition.
Scientists investigating bipolar disorder invited participants to make safe or risky gambles as they spun the wheel in a game of roulette.
Brain activity was measured using a functional magnetic resonance imaging (fMRI) scan that monitors blood flow in the brain.
Professor Wael el-Deredy, from the University of Manchester, said in the journal Brain:
The greater buzz that people with bipolar disorder get from reward is a double-edged sword.
On the one hand, it helps people strive towards their goals and ambitions ...
However, it comes at a cost; these same people may be swayed more by immediate rewards when making decisions and less by the long-term consequences of these actions.
Stray vials of the deadly smallpox virus from the 1950s have been discovered at a federal laboratory near Washington - the second time in a month a deadly pathogen has been found at a US government facility.
Workers discovered the six glass vials in a cardboard box on 1st July while clearing out an old lab on the National Institutes of Health campus in Bethesda, Maryland, the US Centers for Disease Control and Prevention (CDC) said.
They contained freeze-dried smallpox virus and were sealed with melted glass. The vials appeared intact and there is no evidence that lab workers or the general public are at risk, spokesman Tom Skinner said.
Skinner said the CDC is working with the FBI to determine how and when the samples were prepared, and also how they came to be stored and forgotten in the lab.
A roulette game played while undergoing a brain scan has shown that people with bipolar disorder are "wired for risk," scientists have claimed.
People with bipolar disorder appear to be dominated by the brain's "pleasure centre" that drives us to seek out and pursue rewards, a study suggests.
The brain area, called the nucleus accumbens, was more strongly activated in people with bipolar disorder than other volunteers.
Bipolar disorder, previously known as "manic depression", is marked by unpredictable and extreme mood swings.
The death toll from Ebola has risen to 518, as the deadly virus continues to spread.
The World Health Organisation said 50 new cases and 25 deaths had been reported in Sierra Leone, Liberia and Guinea since July 3.
The number of travellers returning to England with a nasty viral illness is on the rise, new figures show.
Between 2012 and 2013, officials saw a 58% increase in the number of holidaymakers suffering with Dengue fever on their return home.
Last year there were 541 cases reported in people returning from dengue-affected countries - compared to 343 in 2012, Public Health England said.
Dengue is a viral infection spread by mosquitoes and symptoms include a severe flu-like illness, fever, headache, muscle ache, rash, nausea and vomiting.
A spokesman said that most cases were reported in travellers to India and Thailand.