Note: Starting October 10th, 2025 this dataset is deprecated and is no longer being updated. As of April 27, 2023 updates changed from daily to weekly.

Summary The cumulative number of positive COVID-19 cases among Maryland residents within a single Maryland jurisdiction.

Description The MD COVID-19 - Cases by County data layer is a collection of positive COVID-19 test results that have been reported each day by the local health department via the ESSENCE system.

Terms of Use The Spatial Data, and the information therein, (collectively the "Data") is provided "as is" without warranty of any kind, either expressed, implied, or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct, indirect, incidental, consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data, nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

NOTE THIS LAYER IS DEPRECATED (last updated 6/7/2022). This was formerly a weekly update. Summary The cumulative total of confirmed COVID-19 cases that have been entered into covidLINK and have been reached for contact tracing interviews as of the date of report. Description As of 12/29/21, contact tracing data, including case counts and percentages, reflect fluctuations in case reporting resulting from a network security incident. In addition, high risk location and large gathering questions were removed from the contact tracing interview questionnaire, as the questions no longer provided actionable information on potential exposure locations due to high levels of COVID-19 community transmission. As of 1/21/22, MDH implemented a new outbound email and text-based contact tracing web survey procedure, reflected in ""Outreach within 24 hours"" metrics." The MD COVID-19 - Contact Tracing Cases Reached and Interviewed data layer reflects the cumulative total of confirmed COVID-19 cases that have been entered into covidLINK and been reached for contact tracing interviews as of the date of report. Individuals that responded to outreach attempts and were verified as the intended call recipient are considered successfully reached. Cases are considered interviewed if they have completed the case investigation interview. Not responding to calls is the primary reason cases are not successfully reached. For cases reached, reasons for not completing an interview include scheduling conflict, hospitalization/incapacitation, and refusal to participate. Data are updated weekly on Wednesday during the 10 a.m. hour (data is reported through the previous Saturday). Terms of Use The Spatial Data, and the information therein, (collectively the "Data") is provided "as is" without warranty of any kind, either expressed, implied, or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct, indirect, incidental, consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data, nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

SummaryThe daily cumulative total of COVID-19 tests administered in Maryland and the average percent daily positive rate.DescriptionTesting volume data represent the static daily total of PCR COVID-19 tests electronically reported for Maryland residents; this count does not include test results submitted by labs and other clinical facilities through non-electronic means. The percent positive rate is a five-day rolling average of positive results as a percentage of all tests.COVID-19 is a disease caused by a respiratory virus first identified in Wuhan, Hubei Province, China in December 2019. COVID-19 is a new virus that hasn't caused illness in humans before. Worldwide, COVID-19 has resulted in thousands of infections, causing illness and in some cases death. Cases have spread to countries throughout the world, with more cases reported daily. The Maryland Department of Health reports daily on COVID-19 cases by county.

Deprecated as of 4/27/2023On 4/27/2023 several COVID-19 datasets were retired and no longer included in public COVID-19 data dissemination. For more information, visit https://imap.maryland.gov/pages/covid-dataSummaryThe daily cumulative total of COVID-19 tests administered in Maryland and the average percent daily positive rate.DescriptionTesting volume data represent the static daily total of PCR COVID-19 tests electronically reported for Maryland residents; this count does not include test results submitted by labs and other clinical facilities through non-electronic means. The percent positive rate is a five-day rolling average of positive results as a percentage of all tests.COVID-19 is a disease caused by a respiratory virus first identified in Wuhan, Hubei Province, China in December 2019. COVID-19 is a new virus that hasn't caused illness in humans before. Worldwide, COVID-19 has resulted in thousands of infections, causing illness and in some cases death. Cases have spread to countries throughout the world, with more cases reported daily. The Maryland Department of Health reports daily on COVID-19 cases by county.

Deprecated as of 12/3/2021. This table will no longer be updated.SummaryThe 7-day average percent positive rate for COVID-19 tests adminstered among Marylanders under 35 years of age and over 35 years of age.DescriptionTesting volume data represent the static daily total of PCR COVID-19 tests electronically reported for Maryland residents; this count does not include test results submitted by labs and other clinical facilities through non-electronic means. The 7-day percent postive rate is a rolling average of each day’s positivity percentage. The percentage is calculated using the total number of tests electronically reported to MDH (by date of report) and the number of positive tests electronically reported to MDH (by date of report).COVID-19 is a disease caused by a respiratory virus first identified in Wuhan, Hubei Province, China in December 2019. COVID-19 is a new virus that hasn't caused illness in humans before. Worldwide, COVID-19 has resulted in thousands of infections, causing illness and in some cases death. Cases have spread to countries throughout the world, with more cases reported daily. The Maryland Department of Health reports daily on COVID-19 cases by county.

This Project Tycho dataset includes a CSV file with COVID-19 data reported in UNITED STATES OF AMERICA: 2019-12-30 - 2021-07-31. It contains counts of cases, deaths, hospitalizations, and demographics. Data for this Project Tycho dataset comes from: "Alabama Department of Public Health Website Dashboard", "Arkansas Department of Health COVID-19 Website Dashboard", "California Health and Human Services Open Data Portal, California Department of Public Health COVID-19 Data", "Colorado Department of Public Health and Environment Open Data Website", "Connecticut Open Data Website, Department of Public Health COVID-19 Data", "Delaware Environmental Public Health Tracking Network, Delaware Health and Social Services Website", "Georgia Department of Public Health Website", "Illinois Department of Public Health Website", "Indiana Data Hub Website, Indiana State Department of Health COVID-19 Data", "COVID-19 Data Repository by the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University", "Kentucky Department of Public Health COVID-19 Website Dashboard", "Maine Center for Disease Control & Prevention; Division of the Maine Department of Health and Human Services Website", "Maryland Department of Health COVID-19 Website Dashboard", "Minnesota Department of Health COVID-19 Website Dashboard", "Montana Department of Health & Human Services COVID-19 Website Dashboard", "New York State Department of Health Data Website", "COVID-19 Data Repository by The New York Times", "Ohio Department of Health COVID-19 website", "Pennsylvania Department of Health Data Website", "Tennessee Department of Health Website", "Texas Department of Health Services Website", "United States Centers for Disease Control and Prevention, COVID-19 Response", "Vermont Department of Health, Vermont Center for Geographic Information Open Geodata Portal", "Virginia Department of Health Website", "European Centre for Disease Prevention and Control Website", "World Health Organization COVID-19 Dashboard". The data have been pre-processed into the standard Project Tycho data format v1.1.

SummaryThe cumulative number of COVID-19 serology testing results among Maryland residents.DescriptionThe MD COVID-19 serology testing data layer is a collection of cumulative COVID-19 serology test results. Total numbers are broken down into positive and negative results. These numbers refer to people tested, not individual tests, some people have had multiple tests. For people with both a negative and a positive test, the positive result is counted. Inconclusive/indeterminate test results are not included in the total. The numbers are updated weekly.COVID-19 is a disease caused by a respiratory virus first identified in Wuhan, Hubei Province, China in December 2019. COVID-19 is a new virus that hasn't caused illness in humans before. Worldwide, COVID-19 has resulted in thousands of infections, causing illness and in some cases death. Cases have spread to countries throughout the world, with more cases reported daily. The Maryland Department of Health reports daily on COVID-19 cases by county.