Which myth about vaccines is not true?

The statement regarding the body's production of more formaldehyde than is present in vaccines is grounded in scientific fact. The human body naturally produces formaldehyde during metabolic processes; it is a compound that occurs as a result of normal cellular functions. In fact, the levels of formaldehyde found in vaccines are significantly lower than what the body creates. This reality underscores the safety of vaccines and highlights a common misconception: that the preservatives or components in vaccines are harmful at the levels they are used.

Understanding this helps dispel fears about vaccine ingredients and reassures patients about the safety and efficacy of immunization. Many people incorrectly believe that vaccines introduce harmful elements in quantities that could overload or harm the immune system, make it more susceptible to diseases, or lead to adverse health effects—none of which are supported by scientific evidence.