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Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses.Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue.
A flu pandemic is when a new type of influenza virus emerges—that most people aren’t immune to—and spreads around the world. ... Flu vaccines are considered effective if they can reduce ...
A 2010 study found a significantly enhanced immune response against the 2009 pandemic H1N1 in study participants who had received vaccination against the swine flu in 1976. [55] The 2009 H1N1 "swine flu" outbreak resulted in the rapid approval of pandemic influenza vaccines. [ 56 ]
The flu shot protects not only the individual but also vulnerable populations like the elderly, pregnant women and people with weakened immune systems. 4. The flu shot doesn’t work
"The flu shot is a killed flu virus that consists of only half of the virus — the part you need to make an immune response to," said Andrew Pekosz, Ph.D., professor of molecular microbiology and ...
Flu season is an annually recurring time period characterized ... Vaccination with the flu shot has been shown to boost the immune system and protect against the ...
Because adults ages 65 and up have the highest risk of severe illness from flu, they should ask for certain shots that produce a stronger immune response than a standard flu vaccine.
A high-dose vaccine (Fluzone High-Dose) four times the strength of standard flu vaccine was approved by the FDA in 2009. [22] [23] [24] This vaccine is intended for people 65 and over, who typically have weakened immune response due to normal aging. The vaccine produces a greater immune response than standard vaccine.
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