It is an age-old, recurring illness -- most adults have been exposed countless times.

CNN: Baby ill? It might not be the flu

One large study of statins in people aged 70-82 years old found that illness and deaths from heart disease fell in those treated with pravastatin but overall there was no difference in mortality as rates of cancer illness and death increased.

BBC: NEWS | Health | Prevention 'may not help elderly'

In 2000 St Dunstan's extended its services to people who had served their country and had become visually impaired through unrelated accident, illness or old age.

BBC: NEWS | UK | England | Southern Counties | Blind charity marks 90th birthday