May 1 Data Improvements

What Changed with the Outbreak-Associated Cases and Testing Data on May 1?

VDH uses several data sources to capture infectious disease data. The Virginia Electronic Disease Surveillance System (VEDSS) is how we capture case information and lab testing data. The Virginia Outbreak Surveillance System (VOSS) is how we capture outbreak information. These two systems connect in some ways, but are intended for different purposes. During the course of an outbreak investigation, public health epidemiologists generally create a new outbreak record in VOSS first and enter the number of cases they’re aware of at that point. We need some of this initial data to be able to call an outbreak ‘Confirmed.’ For COVID-19, we need to have record of two or more epidemiologically-linked cases. Over the course of the investigation, these epidemiologists will conduct case investigations on everyone they identify as part of the outbreak and enter those records into VEDSS. When we’re able to determine that an outbreak has run its course and there are no new cases, these epidemiologists will update the numbers in VOSS to the total count. As you may be able to tell, the number of cases associated with each outbreak can change over time in both systems. Starting on May 1, VDH is combining both of these systems to give a better picture of how many COVID-19 cases are associated with an outbreak.

We have also improved the way we report the number of people who have been tested. Prior to May 1, VDH was reporting the number of unique people who had been tested for SARS-CoV-2, the virus that causes COVID-19. This was a valid measure early in the response as people were typically being tested once. As this response evolves, we have made the change to report the number of people tested per day rather than the number of unique people who have been tested at any point during the response. We know individual people, especially healthcare workers and those in high-risk settings, may be tested more than once over time. This new method of providing test data also allows us to provide the number of tests per day. We believe these data to be a better representation of SARS-CoV-2 testing in Virginia, and a better guide to the public and policy-makers as they assess availability.

These new methods are a good reminder that VDH will be continuously improving the way we present surveillance data. Please check back regularly for improvements!

COVID-19 Data Insights

Welcome to COVID-19 Data Insights, which will complement the daily COVID-19 Cases in Virginia report with more in-depth analyses. VDH will update the COVID-19 Data Insights as new analyses become available. We will continue to use the subscription service to distribute these Insights updates. COVID-19 Cases in Virginia remains the source for official COVID-19 statistics from the Virginia Department of Health.

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COVID-19 in Virginia

See the Numbers

Tracking COVID-19 in Virginia

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Latest COVID-19 case, testing, and vaccine data for Virginia.

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More in-depth analyses on COVID-19.

Featured Content

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COVID-19 Symptoms

Are you feeling sick?

People with COVID-19 might not have any symptoms. If they do, their symptoms can range from mild to severe. Not everyone with COVID-19 will have all these symptoms. Symptoms typically appear 2-14 days after exposure to the virus.

If you have symptoms or signs of COVID-19, look for a free COVID-19 test near you

Important Information About COVID-19

Looking for a vaccination site?

Go to Vaccinate Virginia to find out where to schedule an appointment near you.

Protect Your Health

Are you protected against COVID-19?

There is no single step or strategy that can stop the spread of COVID-19. Instead, we need to follow multiple strategies--all at the same time--to stop the spread.

Your layers of prevention

COVID-19 Vaccinations

Everyone in Virginia age 6 months or older is eligible for the COVID-19 vaccine!

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Wearing masks is an important tool to help stop the spread of COVID-19.

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Physical Distancing

Physical distancing is a way to slow the spread of COVID-19 by reducing close contact between people.

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Hand Washing

Washing your hands often will help to keep your family safe from COVID-19, and also other illnesses like the cold and flu.

Your layers of containment

Know Your COVID-19 Status

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COVID-19 Testing

No matter your vaccination status, consider a COVID-19 test if you're feeling sick or have symptoms of COVID-19. A quick test can give you results so you can know if you’re carrying the virus.

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Contact Tracing

Contact tracing is an important part of how Virginia can stop the spread of COVID-19. Contact tracing and case investigations are important because it helps VDH to:

  • Provide guidance and education about how to keep yourself and others safe
  • Inform public health actions
  • Understand communities hit hard by COVID-19
  • Track the progress of the outbreak in Virginia
  • Connect people with resources they may need
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Isolation and Quarantine

Guidance and Resources

Prevention in our Community, Businesses and Schools

Get Involved

Interested in volunteering?

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Virginia Medical Reserve Corps

Please consider joining our Virginia Medical Reserve Corps COVID-19 response team.  If you are passionate about your community’s health, we have a service opportunity for you.
Learn more about joining Virginia Medical Reserve Corps COVID-19 response team.

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Community Ambassadors

As an Ambassador, you'll help share COVID-19 updates and materials from top experts and sources. We need people like you who can spare a few minutes each week to help keep Virginians safe.
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Now Hiring Covid-19 Positions

Open Positions

The Virginia Department of Health is recruiting contractors for opportunities to support COVID-19 response efforts:

How to Apply

If you are interested in these positions, please contact one of the staffing agencies and let them know you are applying for a COVID-19 position through the Virginia Department of Health.

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