London, England (CNN) -- No one doubts that the most high-profile health crisis of 2009 was the unexpected outbreak of H1N1 -- the swine flu virus that has claimed almost 10,000 lives, according to the World Health Organization.The worldwide pandemic was on the front page of every major news outlet for months on end as people struggled to understand the impact of the first such flu outbreak in over 40 years.Equally, the vaccine for swine flu, which came out a record five months after the first reported cases of the virulent virus in Mexico, has...