| http://www.w3.org/ns/prov#value | - Pharmaceutical company Sanofi Pasteur said seasonal influenza is caused by influenza viruses such as H1N1 and H3N2, and attacks the respiratory system, while pandemic influenza occurs when the virus spreads and infects a large number of people.People usually misunderstand influenza as only an influenza-like illness, such as the common cold, because of their similar symptoms like fever, headache, m
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