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I don't think it is about profit, but production timing of making the vaccine.
In Feburary, the World Health Organization assesses the strains of virus most likely in the northern hemisphere the following winter. Production of the vaccine is March each year, so time for a new strain to surface before vaccination takes place from September onwards.
I would not accuse Pharmacies of making a profit over a fourth strain but praise them. You cannot put a price on life. The flu is a killer as I tried to explain in post #7.
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David
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