What are the ingredients in the flu vaccine 2020?
What’s in a flu shot?
- Egg protein. Many flu vaccines are made by growing the viruses inside fertilized chicken eggs.
- Preservatives. Vaccine manufacturers add the preservative thimerosal to multidose vaccine vials.
- Stabilizers.
- Antibiotics.
- Polysorbate 80.
- Formaldehyde.
What is the adjuvanted flu vaccine?
An adjuvant is an ingredient added to a vaccine that helps create a stronger immune response to vaccination. FLUAD Quadrivalent is approved for use among people 65 years and older, who often have a lower protective immune response after flu vaccination compared to younger, healthier people.
How is Laiv made?

Currently, reassortant viruses for Russian LAIV are prepared by classical reassortment in eggs of wild-type influenza A and B viruses with two cold-adapted master donor viruses (MDVs) as a backbone: A/Leningrad/134/17/57 (H2N2) and B/USSR/60/69, respectively.
What type of vaccine was the H1N1?
Both the injected vaccine (flu shot) and nasal spray forms of the vaccine against the 2009 H1N1 virus were produced and licensed by the Food and Drug Administration. The vaccine first became available in early October, and more doses are becoming available every week.
Does flu vaccine contain pork?
The nasal flu vaccine does contain hydrolysed gelatine derived from pork as one of its additives. Gelatine is commonly used in a range of pharmaceutical products, including many capsules and some vaccines. The gelatine used in Fluenz is a highly purified product used to stabilise live viral vaccines.

What are adjuvants made of?
Several different adjuvants are used in U.S. vaccines.
Adjuvant | Composition |
---|---|
Aluminum | One or more of the following: amorphous aluminum hydroxyphosphate sulfate (AAHS), aluminum hydroxide, aluminum phosphate, potassium aluminum sulfate (Alum) |
AS04 | Monophosphoryl lipid A (MPL) + aluminum salt |
Does Covid vaccine contain egg?
The COVID-19 vaccines authorized by FDA are not manufactured using egg products or technology.