There is likely a link between long-haul flights and deadly
blood clots, medical experts and international airlines said
Tuesday. 

  At a brainstorming session organized by the World Health 
  Organization, the experts and airline representatives agreed
  that air travel and deep vein thrombosis were probably linked
  and decided to launch a three-pronged study. They said it
  could take a long time to find answers.

  Experts said the study will need to look at passengers before 
  they get on an airplane and after they get off to see who 
  actually develops blood clots.

  Deep vein thrombosis is a condition in which a blood clot forms
  in the deep veins of the legs. It becomes potentially deadly
  when part of the clot breaks off and blocks a blood vessel in
  the lungs, known as thromboembolism. Experts say airline
  passengers may be at particular risk because they sit still for
  long periods.
  
  GENEVA (AP) -
  Subject: InfoBeat News - Morning Coffee Edition - 3/14/2001
  Date: Wed, 14 Mar 2001 06:12:53 MST        

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Perceptions" note:

The 'expert' opinion quoted above would sound less like a 
defensive response, and would also make more sense, if similar 
outcomes - DVTs etc - had happened to bus/coach passengers,
students, seminars, conventions, TV watchers etc.

Additionally, although not mentioned in press reports to
date:- we long ago forecast that east-west long-haul flights
would tend to give different outcomes. Ie. lightened cell density
and therefore speeded-up cellular activity, including that
of the heart and glands. From:-
   
http://www.perceptions.couk.com/uef/fertility.html#caution
http://www.perceptions.couk.com/jetlag.html
http://www.perceptions.couk.com/jetlag2.html
http://www.perceptions.couk.com/jetlag3.txt
http://www.perceptions.couk.com/jetlag4.txt

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              FURTHER REFERENCES

  GO - "search perceptions" - in SEARCH-ENGINE


file-ID www.perceptions.couk.com/jetlag5.txt