Sometimes, after an arm or leg has been amputated, the person continues to feel pain or other sensations as though the amputated limb were still there.

The life-saving polio vaccine is now routinely given, but in the first half of the 20th century polio sowed fear, and the iron lung was the symbol of childhood thwarted.

Obesity, road deaths, drug abuse, ho hum heard it all before. Health authorities are employing top graphic artists to jolt us into a new awareness of major health issues.

Images from artist Fritha Langerman's 'Subtle Thresholds' exhibition, exploring infectious diseases and the inter-relationships among the zoological, human and microbial worlds.

The global tobacco industry is out to get women and girls. But not without a fight: this shock-you-to-your-senses campaign hits back.