• Question: How do scientists know how to make a flu vaccine if viruses can be different every year?

    Asked by anon-248496 to Zoya, Tom, Stacey, Laura, James, Connor on 15 Mar 2020.
    • Photo: James Lees

      James Lees answered on 15 Mar 2020:

      It’s an educated guess.

      Scientists use lots of data to figure out which flu strains are going to be the most common that year and turn that into a vaccine that they use.

    • Photo: Zoya

      Zoya answered on 18 Mar 2020:

      The flu vaccine is normal a mixture of a few strains of viruses that are most prevalent. The benefit of giving you a mixture dose is so you have sort of over all immunity. Flu vaccines are strains of influenza.