HUMAN HEALTH AND THE ENVIRONMENT Just the flu.doc

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Department
Environmental Science
Course
EESA10H3
Professor
Jovan Stefanovic
Semester
Winter

Description
HUMAN HEALTH AND THE ENVIRONMENT – Just the Flu Documentary notes -influenza is a disease that had killed before -we are defenseless and we don’t have a vaccine that will provide long- term immunity against influenza -most infections are worldwide -influenza virus are replicating life forms and they have no purpose other than to replicate and so we have to consider not only the end result of the replication but also the biology that goes into the replication to really understand these agents and use that knowledge so we can replicate better than they do -victims number in the thousands due to influenza -since 1957, 700,000-750,000 individuals have died during the non- pandemic seasons in the United States -during a minor epidemic in France, 30,000 people may die from the flu in three short weeks  that’s twice as many that have died of AIDS in ten years -the modern history of the flu began in London, England -in 1927, ferrets were used to research the influenza virus -in 1933, Christopher Andrews and his colleagues were able to isolate the first human influenza virus from a ferret which caught the flu from one of the lab assistants -from 1933 on, ferrets have been coming down with the human flu -with the invention of the electron microscope, more was found out about the virus  learned how it infects cells and its size (more than a million virus can condense on a pin –usually the flu comes on very quickly, starts off with a high fever and affects the whole body, get aching muscles, headaches, a dry cough and a high fever -with a cold the symptoms are more localized, a stuffy nose, a sore throat, no/mild fever -flu is an airborne virus that multiplies in the respiratory tract and it is transmitted by tiny droplets in the air like the spray of an aerosol can -the moment an infect cough/sneezes, the person nearby becomes infected by the virus  the droplets are microscopic -the virus can be transferred by inanimate objects  the virus can survive up to an hour on inanimate surfaces  why washing hands frequently is important -there are three types of influenza viruses  Type A, B, and C -Type A is the most dangerous  has subtypes and surface protein (hemoglobin and neuroaminidase) are used to distinguish between them  H and N -starting with H1N1, every member of the extended family has its own nickname-within each subtypes are different variants of the virus and the name given correspond with the name of the place where they’ve been isolated for the first time -we can get influenza several times because it’s a different virus each time th -every year, 1/5 of the world’s population boards a plan to an international destination -flu can also be spread through promiscuity and overpopulation -in birds, there are 13 different types of flu viruses  but the bird viruses cannot infect humans but they can infect pigs and pigs can infect humans -raising pigs and ducks is an age-old tradition for Chinese farmers  because pigs and d
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