Flu Vaccine

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Description:

The influenza (flu) vaccine is designed to prevent infection from the influenza virus, which causes seasonal flu outbreaks each year. The vaccine helps the immune system develop antibodies to fight off flu strains expected to be most common in a given season. Lowers chances of getting sick by 40-60%, depending on the season’s strain match.

Flu vaccines are typically quadrivalent (protecting against four strains) and can be inactivated (killed virus), live-attenuated (weakened virus), or recombinant (synthetically made, egg-free). Unlike some vaccines that provide lifelong protection, flu vaccines only last one season (about 6-12 months).


Choosing the Right Flu Vaccine

For young children: Any standard IIV4 vaccine (Fluzone, FluLaval, Fluarix, Afluria)

For seniors (65+): Fluzone High-Dose or Fluad for stronger protection

For egg-allergic individuals: Flucelvax (cell-based) or Flublok (recombinant)

For those who hate needles: FluMist (nasal spray, but with some restrictions)


Vaccine Brand

Type

Delivery

Age Group

Key Features

Fluzone Quadrivalent

IIV4

Injection

6 months+

Standard flu shot, widely used

FluLaval Quadrivalent

IIV4

Injection

6 months+

Interchangeable with Fluzone

Fluarix Quadrivalent

IIV4

Injection

6 months+

Similar to FluLaval

Afluria Quadrivalent

IIV4

Injection

6 months+

Alternative to Fluzone

Fluzone High-Dose

HD-IIV4

Injection

65+

4x antigen for stronger immunity

Fluad Quadrivalent

aIIV4

Injection

65+

Adjuvanted for better immune response

Flucelvax Quadrivalent

ccIIV4

Injection

6 months+

Egg-free, cell-based production

Flublok Quadrivalent

RIV4

Injection

18+

Egg-free, recombinant technology

FluMist Quadrivalent

LAIV4

Nasal Spray

2-49 years

Only non-injection option

Treatment For:

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Influenza

AI generated Summary: The flu vaccine is moderately effective in reducing the risk of influenza infection by 40-60% during well-matched seasons. Although it doesn't provide complete protection, it significantly reduces hospitalizations, flu-related deaths, and community spread, especially for high-risk groups like seniors, pregnant individuals, and those with chronic conditions.

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JAFERD+

  • February 25, 2025

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