What type of vaccine should patients with egg allergies avoid?

Individuals with egg allergies should avoid the influenza vaccine due to its production process, which involves embryonated chicken eggs. Most traditional formulations of the influenza vaccine contain a small amount of egg protein, which could potentially trigger an allergic reaction in susceptible individuals.

While some newer influenza vaccines have been developed using cell-based or recombinant technology that does not involve eggs, this question typically refers to the standard influenza vaccine. The recommendation for patients with severe egg allergies is to consult with an allergist, as in many cases, they can receive the vaccine safely under medical supervision.

The other vaccines listed, such as the pneumococcal, meningococcal, and hepatitis B vaccines, do not contain egg protein and are generally considered safe for individuals with egg allergies. Hence, the focus on the influenza vaccine as the one to avoid is based on its specific production methodology that poses a risk to those with egg allergies.