The dreaded AH1N1 flu virus has less affect on elderly people. It is because of some kind of immunity from the disease that the body develops with age.

A study carried out at the Centre for Disease Control and Prevention (CDC) in Atlanta, United States, has revealed that most of the older people have remained unaffected by the virus; but the younger people could not escape the clutches of this virus so easily.

Anne Schuchat (Interim Deputy Director for Science and Public Health Programmes, CDC) said, "Adults might have some degree of pre-existing antibodies that help ward off the new H1N1 virus infection, especially older adults over 60 or 65."

According to the study only 1% of flu victims have been found to be over 65 years of age.

More than 64 per cent of U. S. infections have cropped up among people between five and 24 years of age.

The deadly swine flu outbreak has shaken the health authorities around the globe as the total number of infections have reached 11,000 cases, with 85 deaths.

As far as India is concerned, the 80 people who were sampled for suspected swine flu were in the age group of 20 to 40. Only a 23-year-old man, who flew from New York to Hyderabad last week, has been tested positive for the deadly virus.

As per the latest health ministry figures, nearly 7.86 lakh passengers have been screened in various cities of the country.