• National Immunization Survey Adult COVID Module (NIS-ACM): CDC is providing information on the updated 2024-25 COVID-19 vaccine, the 2024-25 seasonal flu vaccine, and the RSV vaccine uptake and confidence. These data represent trends in vaccination status and intent, and other behavioral indicators, by demographics and other characteristics.

• The data start in September 2024.

• The archived data can be found here: - 2023-24 season: https://data.cdc.gov/Vaccinations/National-Immunization-Survey-Adult-COVID-Module-NI/uc4z-hbsd/about_data - Before October 2023:
https://data.cdc.gov/Vaccinations/National-Immunization-Survey-Adult-COVID-Module-NI/udsf-9v7b/about_data

The NCHS Rapid Surveys System includes questions sponsored by CDC programs and other partners to address time-sensitive data needs, public health attitudes or behaviors, and developmental work to improve concept measurement and inform future question design. It also includes standard variables used for sample weighting and calibration, as well as selected portions of existing content from NCHS surveys (such as the National Health Interview Survey) to compare panel estimates to these benchmarks, assess the fitness-for-use of the panel survey data, and for other methodological purposes.

The Behavioral Risk Factor Surveillance System (BRFSS) is a state-based system of health surveys that collects information on health risk behaviors, preventive health practices, and health care access primarily related to chronic disease and injury. For many states, the BRFSS is the only available source of timely, accurate data on health-related behaviors.

2003-2015. Global School dataset. The Global School-based Student Health Survey (GSHS) was developed by the World Health Organization (WHO) in collaboration with the United Nations' UNICEF, UNESCO, and UNAIDS; and with technical assistance from CDC. The GSHS is a school-based survey conducted primarily among students aged 13-17 years in countries around the world. It uses core questionnaire modules that address the leading causes of morbidity and mortality among children and adults worldwide: 1) Alcohol use, 2) dietary behaviors, 3) drug use, 4) hygiene, 5) mental health, 6) physical activity, 7) protective factors, 8) sexual behaviors that contribute to HIV infection, other sexually-transmitted infections, and unintended pregnancy, 9) tobacco use, and 10) violence and unintentional injury. This dataset contains global data from 2003 – 2015. Additional information about the GSHS can be found at https://www.cdc.gov/gshs/index.htm.

Stata formatted data files for the CDC's Youth Risk Behavior Survey

Users can download reports and data on disabilities in the United States. Background The National Health Interview Survey on Disability (NHIS-D) was a supplement to the National Health Interview Survey (NHIS), both conducted by the Centers for Disease Control and Prevention (CDC). The purpose of the survey was to gather information to better understand disability, to develop policies, and to gather statistics on a number of health conditions. There were 3 additional sections used exclusively to gather information about children with disabilities: spec ial health needs, special education, and early childhood development. User Functionality Users can download the following: Report on Disability, all the surveys (including the ones for children), the data analysis reports, and the data sets. Data can usually be viewed by age group. Links to resources are also provided on the site. Data NotesThe NHIS- D was conducted in 1994 and 1995.

National Immunization Survey Child COVID Module (NIS-CCM): CDC is providing information on COVID-19 vaccine confidence to supplement vaccine administration data. These data represent trends in vaccination status and intent, and other behavioral indicators, by demographics and other characteristics.

The National Health Interview Survey (NHIS) is the principal source of information on the health of the civilian noninstitutionalized population of the United States and is one of the major data collection programs of the National Center for Health Statistics (NCHS) which is part of the Centers for Disease Control and Prevention (CDC). The National Health Survey Act of 1956 provided for a continuing survey and special studies to secure accurate and current statistical information on the amount, distribution, and effects of illness and disability in the United States and the services rendered for or because of such conditions. The survey referred to in the Act, now called the National Health Interview Survey, was initiated in July 1957. Since 1960, the survey has been conducted by NCHS, which was formed when the National Health Survey and the National Vital Statistics Division were combined. NHIS data are used widely throughout the Department of Health and Human Services (DHHS) to monitor trends in illness and disability and to track progress toward achieving national health objectives. The data are also used by the public health research community for epidemiologic and policy analysis of such timely issues as characterizing those with various health problems, determining barriers to accessing and using appropriate health care, and evaluating Federal health programs. The NHIS also has a central role in the ongoing integration of household surveys in DHHS. The designs of two major DHHS national household surveys have been or are linked to the NHIS. The National Survey of Family Growth used the NHIS sampling frame in its first five cycles and the Medical Expenditure Panel Survey currently uses half of the NHIS sampling frame. Other linkage includes linking NHIS data to death certificates in the National Death Index (NDI). While the NHIS has been conducted continuously since 1957, the content of the survey has been updated about every 10-15 years. In 1996, a substantially revised NHIS questionnaire began field testing. This revised questionnaire, described in detail below, was implemented in 1997 and has improved the ability of the NHIS to provide important health information.

The National Health and Nutrition Examination Survey’s (NHANES) National Youth Fitness Survey (NNYFS) was conducted in 2012 to collect nationally representative data on physical activity and fitness levels for U.S. children and adolescents aged 3-15 years, through household interviews and fitness tests conducted in mobile examination centers.
The NNYFS interview includes demographic, socioeconomic, dietary, and health-related questions. The fitness tests included standardized measurements of core, upper, and lower body muscle strength, and gross motor skills, as well as a measurement of cardiovascular fitness by walking and running on a treadmill. A total of 1,640 children and adolescents aged 3-15 were interviewed and 1,576 were examined.
This set of restricted data files contains indirect identifying and/or sensitive information collected in NNYFS. For NNYFS public use files, please visit NNYFS 2012 at: https://wwwn.cdc.gov/nchs/nhanes/search/nnyfs12.aspx. For more information on the survey design, implementation, and data analysis, see the NNYFS Analytic Guidelines at: https://www.cdc.gov/nchs/nnyfs/analytic_guidelines.htm. For more information on NHANES, visit the NHANES - National Health and Nutrition Examination Survey Homepage at: https://www.cdc.gov/nchs/nhanes/index.htm.

The National Health and Nutrition Examination Survey (NHANES) is designed to assess the health and nutritional status of adults and children in the United States. The survey is unique in that it combines interviews with standardized physical examinations and laboratory tests.
NHANES was conducted on a periodic basis from 1971 to 1994, including NHANES I (1971-1975), NHANES II (1976-1980), NHANES III (1988-1994), and a Hispanic Health and Nutrition Examination Survey (HHANES, 1982-1984). In 1999, NHANES became continuous and has been collecting data annually ever since.
All of the NHANES programs utilized a stratified, multistage probability cluster design to provide a nationally representative sample of the U.S. civilian, noninstitutionalized population. The NHANES interview includes demographic, socioeconomic, dietary, and health-related questions. The examination component conducted in a mobile examination center consists of medical, dental, and physiological measurements, as well as the collection of biospecimens, such as blood and urine for laboratory testing.

This set of restricted data contains indirect identifying and/or sensitive information collected in NHANES prior to 1999. Please refer to the links below for additional data available from NHANES:

• NHANES Public Use Data at: https://wwwn.cdc.gov/nchs/nhanes/Default.aspx
• NHANES Restricted Data: 1999 - present at: https://data.cdc.gov/dataset/National-Health-and-Nutrition-Examination-Survey-N/9ixb-fwvy
• NHANES Genetic Restricted Data at: https://data.cdc.gov/dataset/National-Health-and-Nutrition-Examination-Survey-N/hdx4-e4uu
• NHANES National Youth Fitness Survey (NNYFS) Restricted Data at: https://data.cdc.gov/dataset/3-NHANES-National-Youth-Fitness-Survey-NNYFS-Restr/5u84-m4rs

The Youth Risk Behavior Surveillance System (YRBSS) collects information about six types of health-risk behaviors that contribute to the leading causes of death and disability among youth and adults in the United States, including: (1) Behaviors that contribute to unintentional injuries and violence; (2) Sexual behaviors related to unintended pregnancy and sexually transmitting diseases, including HIV infection; (3) Tobacco use; (4) Unhealthy dietary behaviors; and (5) Inadequate physical activity. YRBSS also monitors the prevalence of obesity and asthma. The Youth Risk Behavior Survey is conducted during the spring of odd-numbered years and the results are typically released in the summer of the following year. Participating sites may vary from year to year; refer to the Methods page for guidance from the CDC on best practices for combining data from multiple survey years.

This dataset contains model-based Census tract level estimates for the PLACES project by the Centers for Disease Control and Prevention (CDC), Division of Population Health, Epidemiology and Surveillance Branch. It represents a first-of-its kind effort to release information uniformly on this large scale. Data sources used to generate these model-based estimates include Behavioral Risk Factor Surveillance System (BRFSS) 2019 or 2018 data, Census Bureau 2010 population estimates, and American Community Survey (ACS) 2015–2019 or 2014–2018 estimates. The 2021 release uses 2019 BRFSS data for 22 measures and 2018 BRFSS data for 7 measures (all teeth lost, dental visits, mammograms, cervical cancer screening, colorectal cancer screening, core preventive services among older adults, and sleeping less than 7 hours a night). Seven measures are based on the 2018 BRFSS data because the relevant questions are only asked every other year in the BRFSS. This data only covers the health of adults (people 18 and over) in East Baton Rouge Parish. All estimates lie within a 95% confidence interval.

Users can download the survey's report and entire data set to gain information on a variety of health indicators in the United States and Canada. Background The Joint Canada/ United States Health Survey was a one time study conducted with Statistics Canada and the National Center for Health Statistics at the Centers for Disease Control and Prevention (CDC). Both countries conducted the same survey to gather information regarding: health status, limitations of activities, asthma and other medical conditions, mental health, smoking, use of prescription medicines, physical activities, patient satisfaction, health insurance, and health care utilization. User Functionality Users can download the full report of the survey or the entire data set. Data Notes The Joint Canada/ United States Health Survey was conducted in 2002 and 2003. It was a one time telephone survey, with 3,200 Canadian participants and 5,200 American participants.

Users can view and download data regarding youth health behaviors and risk factors from a variety of countries (including the United States). Background The Global School-based Student Health Survey is developed by the World Health Organization (WHO), the Centers for Disease Control and Prevention (CDC), UNICEF, UNAIDS and UNESCO. The survey is conducted in schools around the world and looks at the health behaviors of students. The information is used by countries to establish priorities and develop programs and by international agencies to make comparisons across countries to gain better understanding of the prevalence and trends of health behaviors.The core questionnaires are designed to gain understanding of the leading causes of mortality and morbidity world wide. The students are asked questions about alcohol and drug use, dietary behaviors, hygiene, mental health, physical activity, protective factors, sexual behaviors, tobacco use and violent behaviors. User Functionality From the website, users can view results by country. Many, but not all, countries have released copies of their questionnaire, fact sheets, full reports and their data. The data is available to download to SAS, Access, SPSS or ASCII. Data Notes The survey participants are between 13 and 15 years old. For some countries, the most recent report is from 2010 and the most recent data set available for download is from 2008. The site does not specify when the data sets will be updated.

The Research and Development Survey (RANDS) is a series of cross-sectional surveys using probability-sampled commercial survey panels. Some rounds also include non-probability panels. The eighth round of RANDS (RANDS 8) was administered by NORC at the University of Chicago using the AmeriSpeak Panel. Samples also were purchased by NORC from the Lucid and Community Marketing Insights (CMI) non-probability panels. Data were collected from June 8, 2023 to July 24, 2023. RANDS 8 contained the embedded probe questions and experiments as in previous rounds of RANDS. It included questions on disability, aspects of life, emotional well-being, and the reason behind perceived acts of discrimination. The AmeriSpeak part of RANDS 8 has a known survey sampling design and can be used to produce nationally and sub-nationally representative estimates.

a. Updated on March 28, 2025 to comply with the President’s Executive Order 14168.

This data represents the age-adjusted prevalence of high total cholesterol, hypertension, and obesity among US adults aged 20 and over between 1999-2000 to 2017-2018. Notes: All estimates are age adjusted by the direct method to the U.S. Census 2000 population using age groups 20–39, 40–59, and 60 and over. Definitions Hypertension: Systolic blood pressure greater than or equal to 130 mmHg or diastolic blood pressure greater than or equal to 80 mmHg, or currently taking medication to lower high blood pressure High total cholesterol: Serum total cholesterol greater than or equal to 240 mg/dL. Obesity: Body mass index (BMI, weight in kilograms divided by height in meters squared) greater than or equal to 30. Data Source and Methods Data from the National Health and Nutrition Examination Surveys (NHANES) for the years 1999–2000, 2001–2002, 2003–2004, 2005–2006, 2007–2008, 2009–2010, 2011–2012, 2013–2014, 2015–2016, and 2017–2018 were used for these analyses. NHANES is a cross-sectional survey designed to monitor the health and nutritional status of the civilian noninstitutionalized U.S. population. The survey consists of interviews conducted in participants’ homes and standardized physical examinations, including a blood draw, conducted in mobile examination centers.

The National Home and Hospice Care Survey (NHHCS) is a series of surveys of a nationally representative sample of home health and hospice agencies in the United States. It provides descriptive information on home health and hospice agencies, their staff, their services, and their patients. Information collected on agencies includes the year an agency was established, the types of services provided, referral sources, specialty programs, and staff characteristics. Data collected on home health patients and hospice discharges include age, sex, race, ethnicity, services received, length of time since admission, diagnoses, medications taken, advance directives, and more. Surveys have been conducted in 1992, 1993, 1994, 1996, 1998, 2000, and 2007. Sample design varies by year. The survey was redesigned and expanded in 2007 to include new data items and a supplemental survey of home health aides employed by home health and/or hospice agencies called the National Home Health Aide Survey (NHHAS).

The National Survey of Family Growth (NSFG) gathers information on family life, marriage and divorce, pregnancy, infertility, use of contraception, and men's and women's health. The survey results are used by the U.S. Department of Health and Human Services and others to plan health services and health education programs, and to do statistical studies of families, fertility, and health. Years included: 1973, 1976, 1982, 1988, 1995, 2002, 2006-2010; Data use agreement at time of file download:

In 1984, the Centers for Disease Control and Prevention (CDC) initiated the state-based Behavioral Risk Factor Surveillance System (BRFSS)--a cross-sectional telephone survey that state health departments conduct monthly over landline telephones and cellular telephones with a standardized questionnaire and technical and methodologic assistance from CDC. BRFSS is used to collect prevalence data among adult U.S. residents regarding their risk behaviors and preventive health practices that can affect their health status. Respondent data are forwarded to CDC to be aggregated for each state, returned with standard tabulations, and published at year's end by each state. In 2011, more than 500,000 interviews were conducted in the states, the District of Columbia, and participating U.S. territories and other geographic areas.The files in this deposit were downloaded from the CDC website by Julia Dennett, Yale University, and Toby Chaiken, J-PAL North America, and archived by Travis Donahoe, Harvard University and Michael Darisse, Cornell University. Additional information edited by Michael Darisse and Lars Vilhuber, Cornell University and American Economic Association.

The Research and Development Survey (RANDS) is a platform designed for conducting survey question evaluation and statistical research. RANDS is an ongoing series of surveys from probability-sampled commercial survey panels used for methodological research at the National Center for Health Statistics (NCHS). RANDS estimates are generated using an experimental approach that differs from the survey design approaches generally used by NCHS, including possible biases from different response patterns and sampling frames as well as increased variability from lower sample sizes. Use of the RANDS platform allows NCHS to produce more timely data than would be possible using traditional data collection methods. RANDS is not designed to replace NCHS’ higher quality, core data collections. Below are experimental estimates of reduced access to healthcare for three rounds of RANDS during COVID-19. Data collection for the three rounds of RANDS during COVID-19 occurred between June 9, 2020 and July 6, 2020, August 3, 2020 and August 20, 2020, and May 17, 2021 and June 30, 2021. Information needed to interpret these estimates can be found in the Technical Notes. RANDS during COVID-19 included questions about unmet care in the last 2 months during the coronavirus pandemic. Unmet needs for health care are often the result of cost-related barriers. The National Health Interview Survey, conducted by NCHS, is the source for high-quality data to monitor cost-related health care access problems in the United States. For example, in 2018, 7.3% of persons of all ages reported delaying medical care due to cost and 4.8% reported needing medical care but not getting it due to cost in the past year. However, cost is not the only reason someone might delay or not receive needed medical care. As a result of the coronavirus pandemic, people also may not get needed medical care due to cancelled appointments, cutbacks in transportation options, fear of going to the emergency room, or an altruistic desire to not be a burden on the health care system, among other reasons. The Household Pulse Survey (https://www.cdc.gov/nchs/covid19/pulse/reduced-access-to-care.htm), an online survey conducted in response to the COVID-19 pandemic by the Census Bureau in partnership with other federal agencies including NCHS, also reports estimates of reduced access to care during the pandemic (beginning in Phase 1, which started on April 23, 2020). The Household Pulse Survey reports the percentage of adults who delayed medical care in the last 4 weeks or who needed medical care at any time in the last 4 weeks for something other than coronavirus but did not get it because of the pandemic. The experimental estimates on this page are derived from RANDS during COVID-19 and show the percentage of U.S. adults who were unable to receive medical care (including urgent care, surgery, screening tests, ongoing treatment, regular checkups, prescriptions, dental care, vision care, and hearing care) in the last 2 months. Technical Notes: https://www.cdc.gov/nchs/covid19/rands/reduced-access-to-care.htm#limitations