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2009 H1N1 Vaccine: Inactivated Swine Flu Shot

Getting The Swine Flu Vaccine: What You Need to Know

What is 2009 H1N1 influenza?

2009 H1N1 influenza (also called Swine Flu) is caused by a new strain of influenza virus. It has spread to many countries. Like other flu viruses, 2009 H1N1 spreads from person to person through coughing, sneezing, and sometimes through touching objects contaminated with the virus. Signs of 2009 H1N1 can include:

Some people also have diarrhea and vomiting. Most people feel better within a week. But some people get pneumonia or other serious illnesses. Some people have to be hospitalized and some die.

How is 2009 H1N1 different from regular (seasonal) flu?

Seasonal flu viruses change from year to year, but they are closely related to each other. People who have had flu infections in the past usually have some immunity to seasonal flu viruses (their bodies have built up some ability to fight off the viruses). The 2009 H1N1 flu is a new flu virus. It is very different from seasonal flu viruses. Most people have little or no immunity to 2009 H1N1 flu (their bodies are not prepared to fight off the virus).




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