Epidemiologists

Summary

Epidemiologists collect and analyze data, sometimes through interviews, to find the causes of diseases or other health problems.

Quick Facts: Epidemiologists
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What Epidemiologists Do

Epidemiologists are public health professionals who investigate patterns and causes of disease and injury in humans.

Work Environment

Epidemiologists work in offices and laboratories, usually at health departments for state and local governments, in hospitals, and at colleges and universities. Epidemiologists are also employed in the federal government by agencies such as the Centers for Disease Control and Prevention (CDC). Some do fieldwork to conduct interviews and collect samples for analyses. Fieldwork may bring epidemiologists into contact with infectious disease, but the risk is minimal because they receive appropriate training and take extensive precautions before interacting with samples or patients.

How to Become an Epidemiologist

Epidemiologists need at least a master’s degree from an accredited college or university. Most epidemiologists have a master’s degree in public health (MPH) or a related field, and some have completed a doctoral degree in epidemiology or medicine.

Pay

Job Outlook

Overall employment of epidemiologists is projected to grow $pc.toString().replaceAll("^\-","") percent from 2020 to 2030, $gra.

About $tools.number.format('#,###',$op) openings for epidemiologists are projected each year, on average, over the decade. Many of those openings are expected to result from the need to replace workers who transfer to different occupations or exit the labor force, such as to retire.

State & Area Data

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Similar Occupations

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More Information, Including Links to O*NET

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What Epidemiologists Do

Epidemiologists monitor infectious diseases, bioterrorism threats, and other problem areas for public health agencies.

Epidemiologists are public health professionals who investigate patterns and causes of disease and injury in humans. They seek to reduce the risk and occurrence of negative health outcomes through research, community education and health policy.

Duties

Epidemiologists typically do the following:

• Plan and direct studies of public health problems to find ways to prevent and treat them if they arise
• Collect and analyze data—through observations, interviews, and surveys, and by using samples of blood or other bodily fluids—to find the causes of diseases or other health problems
• Communicate their findings to health practitioners, policymakers, and the public
• Manage public health programs by planning programs, monitoring their progress, analyzing data, and seeking ways to improve the programs in order to improve public health outcomes
• Supervise professional, technical, and clerical personnel

Epidemiologists collect and analyze data to investigate health issues. For example, an epidemiologist might collect and analyze demographic data to determine who is at the highest risk for a particular disease. They also may research and investigate the trends in populations of survivors of certain diseases, such as cancer, so that effective treatments can be identified and repeated across the population.

Epidemiologists typically work in applied public health or in research. Applied epidemiologists work for state and local governments, addressing public health problems directly. They often are involved with education outreach and survey efforts in communities. Research epidemiologists typically work for universities or in affiliation with federal agencies, such as the Centers for Disease Control and Prevention (CDC) or the National Institutes of Health (NIH).

Epidemiologists who work in private industry commonly conduct research for health insurance companies or pharmaceutical companies. Those in nonprofit companies often do public health advocacy work. Epidemiologists involved in research are rarely advocates, because scientific research is expected to be unbiased.

Epidemiologists typically specialize in one or more of the following public health areas:

• Infectious diseases
• Chronic diseases
• Maternal and child health
• Public health preparedness and emergency response
• Environmental health
• Injury
• Occupational health
• Oral health
• Substance abuse
• Mental health

For more information on occupations that concentrate on the biological workings of disease or the effects of disease on individuals, see the profiles for biochemists and biophysicists, medical scientists, microbiologists, and physicians and surgeons.

Work Environment

Field work may require interaction with sick patients, yet safety precautions ensure that the likelihood of exposure to disease is minimal.

Epidemiologists typically work in offices and laboratories at health departments for state and local governments, in hospitals, and at colleges and universities. Epidemiologists are also employed in the federal government by agencies such as the Centers for Disease Control and Prevention (CDC). Work environments can vary widely, however, because of the diverse nature of epidemiological specializations. Epidemiologists also may work in clinical settings or in the field, where they support emergency actions.

Most epidemiologists spend their time studying data and reports in an office setting. Work in laboratories and the field tends to be delegated to specialized scientists and other technical staff. In state and local government public health departments, epidemiologists may be more active in the community and may need to travel to support community education efforts or to administer studies and surveys.

Because modern science has greatly reduced the amount of infectious disease in developed countries, infectious disease epidemiologists are more likely to travel to remote areas and developing nations in order to carry out their studies. Epidemiologists encounter minimal risk when they work in laboratories or in the field, because they have received appropriate training and take extensive precautions before interacting with samples or patients.

Work Schedules

Most epidemiologists work full time and have a standard work schedule. Occasionally, epidemiologists may have to work long or irregular hours in order to complete fieldwork or tend to duties during public health emergencies.

How to Become an Epidemiologist

Epidemiologists need at least a master’s degree from an accredited postsecondary institution.

Epidemiologists need at least a master’s degree from an accredited college or university. Most epidemiologists have a master’s degree in public health (MPH) or a related field, and some have completed a doctoral degree in epidemiology or medicine.

Education

Epidemiologists typically need at least a master’s degree from an accredited college or university. A master’s degree in public health with an emphasis in epidemiology is most common, but epidemiologists can earn degrees in a wide range of related fields and specializations. Epidemiologists who direct research projects—including those who work as postsecondary teachers in colleges and universities—often have a Ph.D. or medical degree in their chosen field.

Coursework in epidemiology includes classes in public health, biological and physical sciences, and math and statistics. Classes emphasize statistical methods, causal analysis, and survey design. Advanced courses emphasize multiple regression, medical informatics, reviews of previous biomedical research, comparisons of healthcare systems, and practical applications of data.

Many master’s degree programs in public health, as well as other programs that are specific to epidemiology, require students to complete an internship or practicum that typically ranges in length from a semester to a year.

Some epidemiologists have both a degree in epidemiology and a medical degree. These scientists often work in clinical capacities. In medical school, students spend most of their first 2 years in laboratories and classrooms, taking courses such as anatomy, biochemistry, physiology, pharmacology, psychology, microbiology, and pathology. Medical students also have the option to choose electives such as medical ethics and medical laws. They also learn to take medical histories, examine patients, and diagnose illnesses.

Important Qualities

Communication skills. Epidemiologists must use their speaking and writing skills to inform the public and community leaders about public health risks. Clear communication is required for an epidemiologist to work effectively with other health professionals.

Critical-thinking skills. Epidemiologists analyze data to determine how best to respond to a public health problem or an urgent health-related emergency.

Detail oriented. Epidemiologists must be precise and accurate in moving from observation and interview to conclusions.

Math and statistical skills. Epidemiologists may need advanced math and statistical skills to design and administer studies and surveys. Skill in using large databases and statistical computer programs may also be important.

Teaching skills. Epidemiologists may be involved in community outreach activities that educate the public about health risks and healthy living.

Pay

Most epidemiologists work full time and have a standard work schedule. Occasionally, epidemiologists may have to work long or irregular hours in order to complete fieldwork or tend to duties during public health emergencies.

Job Outlook

Overall employment of epidemiologists is projected to grow $pc.toString().replaceAll("^\-","") percent from 2020 to 2030, $gra.

About $tools.number.format('#,###',$op) openings for epidemiologists are projected each year, on average, over the decade. Many of those openings are expected to result from the need to replace workers who transfer to different occupations or exit the labor force, such as to retire.

Employment

Employment of epidemiologists is projected to grow 5 percent from 2018 to 2028, about as fast as the average for all occupations. Epidemiological and public health capacity, which is the ability of state and local agencies to provide public health services and respond to emergencies, has increased dramatically over the past decade. However, there still may be benefits to increasing epidemiological capacity over the projection term. States with large populations tend to have more established programs at this point, but may still expand capacity in certain areas such as mental health and substance abuse. Growth in capacity is expected to be concentrated in states with smaller populations, but large capacity expansions may only require small employment growth.

Epidemiological and public health programs are largely dependent on public funding, and uncertain budgetary conditions are likely to moderate growth.  

Epidemiological and infection control capacity is expected to increase in hospitals as more hospitals join programs such as the National Healthcare Safety Network and realize the benefits of strengthened infection control programs.

Job Prospects

Interest in public health and epidemiology has increased over the past decade. The number of master’s degree programs in public health specializing in epidemiology, as well as the number of graduates from these programs, has increased. Some entrants are finding strong competition for jobs, but applicants who are willing to work in any of the various specialties found in this occupation, rather than those tied to one specialty, may have less difficulty finding work. Because epidemiology is a diverse field, opportunities can generally be found if one takes a broad view.

Contacts for More Information

For more information about epidemiologists, visit

American College of Epidemiology

Council of State and Territorial Epidemiologists

The Society for Healthcare Epidemiology of America

For more information about epidemiology careers in the federal government, visit

Centers for Disease Control and Prevention

National Institutes of Health

For public health–related information, visit

American Epidemiological Society

American Public Health Association

Association of State and Territorial Health Officials

National Academy for State Health Policy

Public Health Foundation

CareerOneStop

For a career video on epidemiologists, visit

Epidemiologists