Good researching Mira, although the first website is a sales site, and rense has been discredited many times, the other sites seem to have credible info.
This shows that there is a high chance that this vaccine, in America and Canada, contains aspartame.
However to put this in perspective, diet drinks and foods contain Aspartame as an artificial sweetener, and has been deemed safe for human consumption, unless the person has an allergy to this chemical compound. The average American and Canadian would ingest many times the amount in the vaccine, in a day or two.
There is a lot of controversy regarding aspartame, and although many countries deem it safe, I personally avoid it, as well as other artificial sweeteners, because I don't think that we know enough about this chemical and its effects, (on insulin reactions in particular), to deem it safe.