英国研究出可预防癌症的普适疫苗(2)

In  2005,  scientists  announced  that  a  vaccine  against  HPV  proved  successful  in  a  trial  involving  more  than  10,000  women.  But  it  may  take  many  years  before  further  testing  is  complete  and  the  vaccine  becomes  widely  available.

Stomach  cancer

There  is  work  underway  to  find  effective  vaccines  against  other  cancer-related  infectious  agents,  including  the  Epstein-Barr  virus  that  appears  in  some  rare  cases  to  promote  tumour  growth  after  many  years  of  infection.

Researchers  are  also  looking  for  new  ways  to  fight  against  Heliobacter  pylori,  a  common  stomach  bacterium.  About  half  of  the  world's  population  is  infected  with  H.  pylori,  with  many  of  these  cases  appearing  in  poor  countries.

According  to  the  new  report,  people  who  have  endured  a  long-term  H.  pylori  infection  have  a  four-  to  sixfold  increased  risk  of  subsequently  developing  gastric  adenocarcinoma,  the  most  common  form  of  stomach  cancer  worldwide.

Journal  reference:  CancerStats:  Infectious  Agents  and  Cancer  (Cancer  Research  UK,  March  2006) (责任编辑：泉水)

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英国研究出可预防癌症的普适疫苗(2)