The human immune system works to protect our bodies against disease. When viruses, bacteria, parasites or other potentially hazardous foreign bodies infiltrate the body, the immune system gets busy so that it can identify the invader, attack it and destroy it all without damaging the body’s own healthy tissues. Once the immune system conquers the invader, it remembers it, giving you naturally acquired immunity.
Although this is an effective system, it requires you to get sick in order to develop immunities. You suffer the symptoms of the illness and may suffer complications too. While you are sick, you will be contagious and may spread the disease to others, whose immune systems may not be working properly or who will be more vulnerable to complications. In some cases, you or others may even die. Immunizations allow us to stimulate the immune system and create immunities without any of the harmful effects of getting the actual illness.
Since the introduction of vaccines, the number of measles, mumps, rubella and tetanus cases have declined by 99 percent. Smallpox, diphtheria and polio cases have declined 100 percent. Whooping cough has declined by 90 percent. A 2005 study determined that every dollar spent on vaccinations saved us about $16 in direct and societal costs. The savings in health and human life may well be incalculable.
Immunizations work. They protect both you and those around you. They allow your immune system to stop infection or illness before it ever starts. If you do get sick, you are more likely to have a less serious form of the illness with fewer complications. Others who are vaccinated are less likely to pass the illness along too, and the entire community is better protected, including newborns who may not be old enough for their shots yet or children and adults who are unable to get shots for health reasons. This is called herd immunity.
Staying current on your vaccines and keeping your kids on a schedule can help you prevent illness personally and on a societal level. Talk to your doctor about which boosters you may need, and evaluate your child’s shot record to ensure that he or she is up to date. Follow your doctor’s recommendations about new or optional vaccinations.