Egg Protein
- Flu vaccines are most commonly made using an egg-based manufacturing process, which is used to make both the inactivated vaccine (the flu shot) and the live attenuated vaccine (usually called the “nasal spray”), according to the CDC.
- The Yellow Fever vaccine is also made this way, putting anyone with an egg allergy at risk if they receive either of these vaccinations, regardless of how low the level of actual egg protein is.
