Prevent & Prosper – Influenza Vaccination for Children

A flu shot, also known as a flu vaccine or influenza vaccine, is a medical intervention designed to protect individuals from the influenza virus. Influenza is a contagious respiratory illness caused by different strains of the influenza virus.

Here’s an overview of the flu shot:

1. Purpose: The primary purpose of a flu shot is to prevent or reduce the severity of influenza infections. It stimulates the immune system to produce antibodies against specific strains of the influenza virus, so the body can recognize and fight the virus if exposed.
2. Types of Flu Shots: There are several types of flu vaccines available:
   • Trivalent vaccines: These protect against three different flu viruses: two influenza A strains and one influenza B strain.
   • Quadrivalent vaccines: These protect against four different flu viruses: two influenza A strains and two influenza B strains.
   • High-dose vaccines: These are designed for individuals over 65 years of age, as they contain a higher concentration of antigens to elicit a stronger immune response.
   • Live attenuated vaccines: These are nasal spray vaccines that contain weakened forms of the virus. They are approved for healthy individuals between 2 and 49 years of age.
   • Egg-free vaccines: Some vaccines are produced without using eggs, which can be beneficial for individuals with egg allergies.
3. Annual Vaccination: The influenza virus undergoes frequent changes, which can lead to the emergence of new strains. Therefore, flu shots need to be updated annually to match the prevalent strains for the upcoming flu season. Experts analyze data to predict which strains are most likely to circulate and include them in the vaccine.
4. Effectiveness: The effectiveness of the flu vaccine can vary from year to year and among different age groups. Factors such as the match between the vaccine and circulating strains, an individual’s age, health status, and immune response can influence how well the vaccine works. Even if the vaccine doesn’t provide complete protection, it can still reduce the severity of illness.