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A Vaccine for the impending pandemic Avian Influenza

All influenza viruses of the type A, including those causing seasonal epidemics of human influenza//, are genetically labile and well adapted to elude host defenses. The tendency of influenza viruses to undergo frequent and permanent antigenic changes necessitates constant monitoring of the global influenza situation and annual adjustments in the composition of influenza vaccines. Due to this tendency of mutation, avian influenza mixed with a human flu, and was thus able to infect humans through direct contact with birds.

According to the World Health Organization, of the 115 people in four Asian countries who have been infected with H5N1 from late 2003 through 2005, 59 have died. Vaccines are the principal medical intervention for protecting individuals against pandemic influenza. If available rapidly and in sufficient quantities, they can reduce the morbidity and mortality in pandemic situations.

According to a news posted on Sept 28, 2005, government scientists at the US National Institute of Allergy and Infectious Diseases (NIAID) announced results from initial clinical trials of a vaccine being developed to protect humans against infection with H5N1 avian influenza. NIAID and MedImmune have joined forces to develop potential pandemic influenza vaccines. HHS Secretary Mike Leavitt today announced that NIAID and MedImmune Inc. have signed a cooperative research and development agreement for the development of vaccines against avian influenza viruses that have the potential to cause pandemics. Speaking of pandemic flu as an urgent health challenge, HHS

Secretary Mike Leavitt said. “This agreement will help speed the process of developing vaccines we will need to fight an outbreak if the avian flu starts to spread rapidly through the human population.” As per the agreement, scientists will add selected genes from avian flu viruses with pandemic potential into a weakened human flu virus to create several attenuated, live virus v accines candidates.

Although there has been an incredible and alarming rise in human cases of bird flu, causing increasing fear of a global pandemic, there seems to be a strong resolve in the scientific community to combat this impending and much dreaded pandemic.

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