Influenza virus vaccine is used to prevent infection by the influenza viruses. The vaccine works by causing your body to produce its own protection (antibodies) against the disease. It is also known as a “flu shot”. There are many kinds of influenza viruses, but not all will cause problems in any given year. Therefore, before the influenza vaccine is produced each year, the World Health Organization (WHO) and the U.S. and Canadian Public Health Services decide which viruses will most likely cause influenza infections for that year. The antigens, which are substances that cause protective antibodies to be formed, for these viruses are included in the influenza vaccine. Usually, the U.S. and Canada use the same influenza vaccine; however, they are not required to do so.
Fluzone high-dose is a drug that falls in the class of viral vaccines. Fluzone High-Dose is majorly used by the elderly, age 65 and above, to protect them from the flu. It works by stimulating the body to produce antibodies that will fight the virus in case one acquires the virus.