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MenQuadfi works by stimulating the vaccinated person natural defense (immune system), to produce protective antibodies against the bacteria.
MenQuadfi only helps to protect against illnesses caused by Neisseria meningitidis types A, C, W and Y.
It does not protect against infections caused by other types of Neisseria meningitidis.
It does not protect against meningitis or septicaemia caused by other bacteria or viruses.
As with any vaccine, MenQuadfi may not fully protect all the people who are vaccinated.
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