COVID-19 Cases by Vaccination Status

As a reminder: All data are preliminary and subject to change.

Dashboard Updated: Weekly on Friday

A COVID-19 vaccine breakthrough case is defined as the detection of SARS-CoV-2 RNA or antigen in a respiratory specimen collected from a person ≥14 days after receipt of all recommended doses of an FDA-authorized COVID-19 vaccine. A death associated with a vaccine breakthrough case must meet the COVID-19-associated mortality criteria.

Even when a vaccine is highly effective, a small percentage of people who are fully vaccinated will still get COVID-19 if they are exposed to the virus that causes it. 

  • No vaccine is 100% effective. 
  • Breakthrough cases occur for all vaccine preventable conditions. 
  • With a vaccine that is 90% effective, 9 out of 10 people are expected to be protected by the vaccine. Up to 10% could still become infected and could get sick. 
  • If only a small number of people are susceptible, very few people end up getting sick. If a large number of people remain susceptible while the virus is spreading, a larger number will be affected. 10% of 10 people is 1 person. 10% of 1,000 people is 100.

This dashboard lists the number and percent of COVID-19 cases, hospitalizations and deaths in Virginia among persons who were NOT fully vaccinated 2-weeks prior to specimen collection for SARS-CoV-2. The number of vaccine breakthrough cases, hospitalizations and deaths are reported with the percentage of these cases out of the total number of fully vaccinated people. There is a slider bar at the top to choose a specific date range. This data can be viewed by health region.

This graph displays the 7-day moving average of all cases by date of illness onset, cases meeting the case definition for vaccine breakthrough, and cases not fully vaccinated* at the time of illness. Not fully vaccinated cases and all cases lines may be indistinguishable until the date range is narrowed.

This graph displays the 7-day moving average of all deaths by date of death, deaths associated with a vaccine breakthrough case, and deaths from COVID-19 in cases not fully vaccinated*.

Each vaccine breakthrough case is reviewed by a subject matter expert and matched to vaccination data from the Virginia Immunization Information System. This takes extra time and may delay reporting of cases on this dashboard.

 *Fully-vaccinated: A person ≥14 days after receipt of all recommended doses of an FDA-EUA COVID-19 vaccine (includes confirmed and probable cases) who received the vaccine according to ACIP recommendations.