FA16 Immunization Module’s Updates

Relative safety of vaccines

In the past decade, the question of the safety of vaccination has garnered considerable attention, largely in the mainstream, non-scientific or medical population. It is not an enormous leap of logic to see that this questioning is unsurprising, given the decreased visibility of the risk of the communicable diseases vaccines protect against. There is merit to an argument about the safety of vaccines, less so the question of relative safety of vaccines.

As with any treatment, a clinical decision must weigh the risks and benefits of multiple courses of action, as very few clinical decisions will ever truly be 100% devoid of risk. For vaccines, the risk of not vaccinating, contracting the illness in question, must be weighed against the risks of vaccinating. Vaccines have allowed much of the developed world to be generations away from firsthand recollection of the diseases they prevent. And furthermore, through the phenomenon of herd immunity, individuals may through anecdotal evidence reinforce their belief that the threat of not vaccinating is non-existent, rather than invisible. However, herd immunity is a tenuous state maintained only through the vaccinations of the vast majority of the susceptible population. The very present, if not tangibly apparent, risk of non-vaccinating is a host of extremely dangerous illnesses, ranging from polio to smallpox, which can be devastating or lethal to a child.

The risks of vaccinating, on the other hand, are considerably less impressive. The most commonly experienced side effects will be fever, chills, muscle aches, and fussiness. The most serious possible side effect is that of a serious allergic reaction, which is life threatening, but occurs with a frequency of about one in a million vaccinations.

<http://www.cdc.gov/vaccines/parents/tools/parents-guide/downloads/parents-guide-part3.pdf>

  • Erika Becerra
  • Kyle Osborn
  • Stephen Shey