Epidemiologist: Duties, Salary, and How to Become One

Epidemiology is the study of diseases and injuries, their origins, how they spread, and strategies for containing or stopping them. Working within this field are epidemiologists, as who pair their scientific knowledge with well-honed research abilities to thoroughly investigate the causes of disease and ensure the public remains healthy and safe.   

While the COVID-19 pandemic shone a light on the most dramatic elements of epidemiology, the truth is that many epidemiologists study a wide range of common diseases and injuries that inflict many of us every day. Some common topics of study include influenza, pneumonia, cancer, birth defects, asthma-inducing air pollution, and heavy metal contamination. 

If you’re someone with an interest in science, medicine, and investigating some of the most important health problems facing humanity today, then you might want to consider a career as an epidemiologist. 

Continue reading to learn more about epidemiologists, what they do, their job outlook, and how to become one. At the end, you’ll also find some suggested courses that can help you explore this increasingly important medical career. 

What is an epidemiologist? 

Epidemiologists are health professionals who identify the causes of a disease, those at risk of contracting it, and how to stop or control its spread. As public health professionals, epidemiologists work to improve health outcomes by using their biological and medical expertise to thoroughly understand the diseases that impact the population at large. 

Typically, epidemiologists are employed by state and local government agencies, such as the US Centers for Disease Control and Prevention (CDC) or the National Institutes of Health (NIH), where they research diseases and advise officials on appropriate policy measures. Many also work within pharmaceutical companies, where they conduct original research and help with the development of vaccines for commercial purposes. 

Read more: Social Epidemiology Explained: Meaning, Impact, and Jobs

Epidemiologist vs. virologist

Both epidemiologists and virologists strive to improve public health by studying the diseases and viruses that make us sick, but they do so from different angles.  

Epidemiologists study the external ways that diseases and viruses spread within a population, what causes this spread, and how to stop or control it.

Virologists, meanwhile, focus their attention on the viruses themselves, studying how they originate, function, and replicate. They then develop vaccines to combat those viruses.

What does an epidemiologist do? 

As they work to stop the spread of disease, epidemiologists perform a variety of important tasks. While these responsibilities might shift from job to job and case by case, some of their most common responsibilities include: 

• Plan, conduct, and supervise research into the origins of various diseases. 

• Oversee the work of technical and administrative staff supporting research efforts. 

• Collect and analyze data acquired through interviews, surveys, blood samples, and other means.

• Advise health officials and policymakers on disease spread and containment strategies.

Epidemiologist salary and job outlook 

If you’re wondering how much epidemiologists make, they tend to command a higher-than-average salary and can expect much faster-than-average job growth over the coming years.

According to the US Bureau of Labor Statistics (BLS), the median annual salary for epidemiologists was $81,390 as of May 2023 [1], which is much higher than the median annual salary of $48,060 for all occupations in the US during the same period [2].

Furthermore, the US BLS projects the need for epidemiologists will grow by 19 percent between 2023 and 2033, resulting in approximately 800 new jobs on average every year [3]. This is much higher than the 4 percent job growth the US BLS projects for all jobs combined during the same period [3]. 

Read more: Is Health Care a Good Career Path? Outlook, Jobs, and More

Epidemiologist jobs 

You have numerous jobs from which to choose within epidemiology, from working out in the field to conducting research in laboratories. Some of the most common jobs you might consider pursuing within the field of epidemiology include: 

• Infection control epidemiologist 

• Molecular epidemiologist 

• Epidemiology investigator 

How to become an epidemiologist 

A career in epidemiology requires a strong educational foundation to effectively investigate diseases and develop the strategies needed to stop their spread. Take a look below at the steps you can take to join this impactful field and turn disease control and prevention into your professional career:   

1. Get a bachelor’s degree.

Typically, professionals working within the field of epidemiology must possess at least a master’s degree in epidemiology or public health. As a result, the first step to joining the field is to gain a bachelor’s degree that prepares you for the training you’ll need to undergo at the graduate level. Some common undergraduate degree subjects include biology, public health, and other majors within the social sciences and public policy. 

Throughout your time as an undergraduate, you will want to take courses that equip you with a foundational understanding of the biological sciences, scientific research principles, and the public health issues epidemiologists focus on. 

2. Focus on your skills. 

Epidemiology is animated by an investigative impulse to get to the bottom of some of the most pressing public health issues plaguing the world today. As you prepare for a career working alongside highly-trained professionals invested in solving pressing public health crises, consider honing some of these critical skills to ensure you do the best possible job:  

• Problem-solving

• Communication

• Collaboration 

• Math

• Statistics

• Data analysis 

Read more: What Are Job Skills?

3. Get a master’s degree in public health (or a related field).

To qualify for a job within epidemiology, you usually must possess at least a master’s degree (though some positions, such as at academic institutions, might even require you to hold a PhD).

Prepare for your career in the field by attending a master’s degree program in public health, epidemiology, or a related scientific field. Sometimes, professionals also pursue a medical degree alongside their more epidemiology-focused one. 

Read more: What Is a Master of Public Health (MPH) Degree?

Learn more about becoming an epidemiologist with Coursera 

To join the ranks of epidemiologist, you need to gain the required education and training. As you’re exploring a future career in epidemiology, you might consider taking a cost-effective online Specialization or pursuing a degree through Coursera. 

Through Johns Hopkins Epidemiology in Public Health Practice Specialization, you can learn to use the core epidemiologic toolset to measure the health of populations, assess interventions, collect and analyze data, and investigate outbreaks and epidemics.

By pursuing the Imperial College London’s Epidemiology for Public Health Specialization, you can equip yourself with the skills that allow you to correctly interpret epidemiological research, consider its limitations, and design your own studies.