evidence: One contributor to the fear of vaccines is the notion that they contain toxins. But "it’s the dose that makes the poison" and it’s distressing that people’s fears are beings stoked by a lack of basic understanding of chemistry and toxicology. So let’s have a close look at some of the "bad boys" the anti-vaxxers love to hate. [...] All vaccines have less than one milligram of aluminium per dose, and most are below half of that. So exposure to aluminium through vaccines is negligible, and well below the already low risk threshold. [...] This is not an exhaustive list but it covers most of the toxins that anti-vaxxers are most concerned about. The remainder of the so-called toxins in vaccines bring up exactly the same issues as highlighted here. The presence of low levels of one of the most common amino acids in our body is apparently now a worry, and I will pass lightly over claims that sodium chloride (common salt) is a toxin in vaccines. There’s really no reason that these compounds should keep people from getting vaccinated.