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RE: Vaccination Dilemma! Seeking the truth about vaccines, we're expecting a baby in Indonesia.
They don't know what flu mutation will appear year to year, and that is why the flu shot is not very effective. Flu vaccines are also one of the few that still have mercury in them too.
Yeah I read up on it and apparently they guess at what strains are most likely to occur and stick 4 or so different strains in the vaccine, something like that anyway.