Category: Internal Medicine

The Role of Vaccines in Preventing Serious Illness

Vaccines have become a regular part of public health efforts and personal healthcare decisions across the globe. Over the years, vaccination programs have led to a dramatic decline in many serious and sometimes deadly diseases. Despite their widespread use, vaccines still face some skepticism, which makes it important to understand how they help prevent illness not just for individuals but for entire communities.

How Vaccines Work

Vaccines work by preparing the immune system to fight infections without causing the disease itself. When a person receives a vaccine, they are exposed to a harmless piece or weakened form of a virus or bacteria. This exposure prompts the body to produce antibodies and memory cells that can quickly respond if the real infection occurs later.

By protecting individuals from disease, vaccines also help slow or stop the spread of infections in communities. This creates a form of protection called herd immunity. When enough people are vaccinated, it becomes harder for a disease to spread, which helps protect those who cannot be vaccinated, such as infants, elderly individuals, or those with weakened immune systems.

Key Vaccinations by Age Group

Vaccination schedules vary by age to provide protection during different stages of life.

Children

For children, some of the vaccines recommended early include MMR, which guards against measles, mumps, and rubella. Polio vaccines have nearly eliminated the disease worldwide and prevent paralysis. The DTaP vaccine protects against diphtheria, tetanus, and pertussis, all of which can cause serious health problems. After the vaccines for DTaP were developed, the incidence of these diseases markedly decreased to only isolated cases.

Vaccines for hepatitis B and rotavirus are also commonly given during childhood. Hepatitis B protects the liver from infection that can become chronic, while rotavirus vaccines help prevent severe diarrhea, a major cause of hospitalization in young children.

Young Teens

As children grow into their teenage years and young adulthood, additional vaccines are advised. The HPV vaccine helps prevent human papillomavirus infections that can lead to certain types of cancers. The HPV vaccine has led to a significant decrease in the incidence of HPV infection and cervical cancer in those that are immunized.

The meningococcal vaccine reduces the risk of meningitis, a dangerous infection of the membranes around the brain and spinal cord. Bacterial meningitis remains a deadly condition that still has a mortality rate of up to 15% even with treatment. Teens are also encouraged to receive a booster shot for tetanus, diphtheria, and pertussis (Tdap) to maintain protection against these diseases.

Adults

Vaccination is not only for children and teens. Adults should continue to receive vaccines to maintain immunity throughout their lives. The annual influenza vaccine is recommended for most adults because flu infections can cause severe illness and even death. Vaccines for hepatitis A and B may be given to adults who are at risk, such as travelers or those with certain health conditions.

Older adults are more susceptible to infections because their immune systems naturally weaken with age. Vaccines recommended for this group include the shingles vaccine, which prevents a painful condition caused by the reactivation of the chickenpox virus. Pneumococcal vaccines protect against pneumonia and other serious infections caused by pneumococcal bacteria. Vaccines against respiratory syncytial virus (RSV) and the flu are also important because these respiratory illnesses can be especially severe in older adults.

Addressing Vaccine Hesitancy

Despite the benefits of vaccines, some people hesitate to get vaccinated due to concerns about side effects or misinformation. It is common to worry about reactions such as soreness at the injection site, mild fever, or fatigue, but these effects are usually short-lived and mild. Serious side effects are very rare, and vaccines are subject to rigorous testing before approval.

The only exception to this is in the case of the COVID 19 vaccine, which was approved much earlier than any previous vaccine. Health authorities continue to monitor the safety of vaccines after they are in use.

Scientific research consistently shows that vaccines are safe and effective. Organizations like the Centers for Disease Control and Prevention and the World Health Organization support vaccination programs based on extensive data. The risks posed by diseases prevented by vaccines far outweigh the small risks associated with vaccination itself.

Many individuals have suggested that vaccination can cause autism or an overwhelmed immune system, however, there is no specific scientific evidence (utilizing the classic scientific method) that shows a true cause and effect in these hypotheses. When making decisions about the use of vaccines individually, it’s best to research the information completely to make the most informed decision about vaccines.

Final Thoughts

Vaccines have prevented countless cases of suffering, disability, and death worldwide. While the rapid development of COVID-19 vaccine was marked by criticism and multiple factors, it should not overshadow the long history and proven safety of older time-tested vaccines. Staying current with vaccinations protects not only the individual but also the community by reducing the spread of disease.

Trusting the scientific evidence behind long established vaccines and making sure immunizations are up to date is one of the simplest and most effective ways to protect health throughout life.

NCHS Recommendations for Entry of Cause of Death

A death certificate is a permanent record of the fact of death of an individual. It provides important personal information about the decedent and about the circumstances and cause of death. Information on cause of death is important to the family to bring closure, peace-of-mind, and to document the exact cause of death. Cause of death is also used for medical and epidemiological research on disease etiology and evaluating the effectiveness of national and international levels.

Physician’s responsibility

The physician’s primary responsibility in completing the cause-of-death section is to report to the best of his or her knowledge, based upon available information, the causal chain that led to the death. The causal chain should begin with the cause that was closest to the time of death and work backwards to the initiating condition which is called the underlying cause of death. For example, the physician might report a death for which staphylococcus pneumonia occurs closest to the time of death; however the physician also reports that the pneumonia is due to carcinoma metastatic to both lungs, which in turn, is due to poorly differentiated adenocarcinoma, unknown primary site.

Medical examiner/coroner’s responsibility

The medical examiner/coroner investigates deaths that are unexpected, unexplained, or if an injury or poisoning was involved. State laws provide guidelines for when a medical examiner/coroner must be notified. In the case of deaths known or suspected to have resulted from injury or poisoning, report the death to the medical examiner/coroner as required by State law. The medical examiner/coroner will either complete the cause-of-death section of the death certificate or waive that responsibility. If the medical examiner/coroner does not accept the case, then the certifier will need to complete the cause-of-death section.

General instructions for completing cause of death

• Cause-of-death information should be your best medical opinion.
• List only one condition per line in Part I. Additional lines may be added as needed.
• Each condition in Part I should cause the condition above it.
• Abbreviations and parentheses should be avoided in reporting causes of death.
• Provide the best estimate of the interval between the presumed onset of each condition and death.
• The original death certificate should be amended if additional medical information or autopsy findings become available that would change the cause of death originally reported.
• For deaths caused by injury or poisoning, complete only if the medical examiner or coroner instructs you to do so.
• The terminal event (e.g., cardiac arrest or respiratory arrest) should not be used. You should report the causes of the terminal event (e.g., cardiac arrest due to coronary artery atherosclerosis or cardiac arrest due to blunt impact to chest).
• If an organ system failure such as congestive heart failure, hepatic failure, renal failure, or respiratory failure is listed as a cause of death, always report its etiology on the line(s) beneath it (e.g., renal failure due to Type I diabetes mellitus). When indicating neoplasms as a cause of death, include the following: 1) primary site or that the primary site is unknown, 2) benign or malignant, 3) cell type or that the cell type is unknown, 4) grade of neoplasm, and 5) part or lobe of organ affected (e.g., primary well-differentiated squamous cell carcinoma, lung, left upper lobe).
• Always report the fatal injury (e.g., stab wound of chest), the trauma (e.g., transection of subclavian vein), and impairment of function (e.g., air embolism).
• In Part II, report all diseases or conditions contributing to death that were not reported in the chain of events in Part I and that did not result in the underlying cause of death.
• If two or more possible sequences resulted in death, or if two conditions seem to have added together, report in Part I the one that, in your opinion, most directly caused death. Report in Part II the other conditions or diseases.