These shots, called Fluad (trivalent) and Fluad Quadrivalent, are another option for flu vaccines that are approved for people ages 65 and older. It includes an ingredient called adjuvant, which also creates a stronger immune system response.

What's the difference between quadrivalent and trivalent flu vaccine?

However, MercyCare Business Health Solutions offers the quadrivalent flu vaccination. This form of the vaccination offers the same benefits as the trivalent with the addition of another strain; it includes a total of four strains of the flu virus: two strains of influenza A and two strains of influenza B.

Are there different flu shots for different age groups?

These include Afluria Quadrivalent, Fluarix Quadrivalent, FluLaval Quadrivalent, and Fluzone Quadrivalent. Different influenza shots are licensed for different age groups. These four vaccines are approved for people 6 months of age and older. Most influenza shots are given in an arm muscle with a needle.