Agree.
Unfortunately the lesser informed look at things like Formaldehyde,and Hydrochloric Acid (HCl) and think these things sound scary.
For those who are interested and as @grahroll outlined, the human body produces significant amounts of hydrochloric acid naturally. Hydrochloric acid is produced in the stomach and role is principally to assist with the digestion of foods (commonly referred to as gastric acid) and also as a disinfectant. A disinfectant being to kill those pathogens which can’t survive in a acid environment. At high concentrations, it can cause burning of sensitive body parts. Also if vapour is inhaled or it is swallowed, it can cause damage to the lungs, oesophagus/trachea, pharynx, throat and oral cavity.
What is also interesting, I am yet to find a reliable source that indicates that hydrochloric acid is specifically added to vaccinations. Unfortunately these sort of claims are common with those which don’t believe in the merit or efficacy of vaccination programs.
An explanation of formaldehyde was provided in this post.
