A cultured or interested person to understand or curious could find the initial information (the hexavalent vaccine is not "six vaccines" but "a vaccine that protects from six diseases) useful, could think about it and find that it is much less risky to administer six vaccines in a single solution that in six different sessions.It could understand that making six separate vaccines exposes you to a risk six times greater than doing them at once.Therefore, in practice, useful information is provided.
Those who have convictions matured in unreliable environments, those who have misconceptions or do not use logic or have little reasoning, will find the sentence not credible, excessive, strange. Also because, probably, he read the exact opposite in the sources that he usually consulted.