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Carroll County, Maryland COVID-19 Cases

Please note, our access to local data continues to be limited due to the Maryland Department of Health network security incident. Some updated data is below. You can find limited statewide data updates at the Maryland Department of Health COVID-19 website.

Limited, preliminary data update – please note this data is subject to change: 

Total confirmed cases in Carroll County as of 1/24/22: 19,449 (+341 since 1/21/22)

Total confirmed deaths in Carroll County as of 1/24/22: 352 deaths (+7 since 1/21/22)

Positivity rate as of 1/24/22: 15.7%

Vaccination data

Case data through the week of 1/16 – 1/22:



Carroll Hospital data:

Read this letter to the community from Carroll Hospital President Garrett Hoover.






Deaths are lagging cases and hospitalizations and data is not complete.

For the 11 deaths added since last week (1 added to week of Jan. 2, 2 added to week of Jan. 9, 8 added to week of Jan. 16):

  • 8 unvaccinated
  • 2 fully vax/not boosted
  • 1 fully vax + boosted (age 80-89)


All data below has not been updated due to the network security incident.

Total Cases: 12,680 (+224 since 11/23)

Total Fatalities: 304 (+2 since 11/23)

Probable Cases: 5,563 (+100 since 11/23)*

Positivity Rate in Carroll County: 9.2% (as of 11/29)**

*Probable cases are those who test positive with an antigen test, not a PCR test. Probable cases are not included in our total confirmed cases (PCR tests are). Probable cases that have been confirmed with PCR tests are removed from the probable case totals.

**View positivity rate by jurisdiction in Maryland at:

Find this information in slides for the Board of Commissioners and Board of Education meetings.

Levels of community transmission as defined by the CDC:
Total new cases per 100,000 in past 7 days: low <10, moderate 10-49, substantial 50-99, high >= 100
– Percent positive tests in past 7 days: low <5%, moderate 5-7.9%, substantial 8-9.9%, high >=10%
– If the two indicators suggest different transmission levels, the higher level is selected.


Please note the excess probable cases the week of 5/9 were due to a reporting delay from a testing facility and probable cases were not complete for the week of 8/29 due to the holiday weekend.

This graph shows hospitalizations by week for COVID positive Carroll County residents, in any hospital. •Report week is the week their case was reported, which may not be the same week they were hospitalized. Only one hospitalization is noted per person. •There is a slight data lag so recent numbers may increase.





Post-Vaccination Infections

Vaccines are an effective and critical tool to bring the pandemic under control by helping to prevent
infection, serious illness, hospitalization and death due to COVID-19. Although there are cases of
people who become sick after they are fully vaccinated, cases where fully vaccinated people are
hospitalized or die from COVID-19 are rare and vaccines remain the best way to prevent COVID-19 and
its complications.

Maryland’s first post-vaccination infection was identified on January 26, 2021. This information reflects cases tested in Carroll County from January 26 – November 27, 2021.

110,927 (65.9%) of all Carroll County residents have been fully vaccinated as of November 29, 2021.

Since January 26, 2021, there have been:



# NOT fully vax (%)

Fully vax (%)

Confirmed Cases


4,919 (82.5)

1,040 (17.5)



393 (83.6)

77 (16.4)



54 (74.0)

19 (26.0)

*Because our number of deaths is low, it is difficult to make conclusions based on vaccination status.


Post-Vaccination Case Rates

While the number of “breakthrough” cases in fully vaccinated individuals has increased, case rates remain much higher in those who are not fully vaccinated. Case rates below represent the number of cases per 100,000 people who are fully vaccinated and those who are not fully vaccinated. This means people who are not fully vaccinated are still at much higher risk of getting COVID-19.


Note: All data are preliminary and subject to change based on additional reporting. Due to different reporting timeframes and other selection criteria, there may be differences between the data presented here and elsewhere on this page.

People are considered fully vaccinated 14 days after receiving the last required dose of an FDA-authorized COVID-19 vaccine. Post-vaccination infections are identified when SARS-CoV-2 RNA is detected in a specimen collected at least 14 days after receipt of the last required dose of vaccine. Identification of post-vaccination infections requires that vaccination data be reported to the state immunization registry and that the vaccination record can be matched to the SARS-CoV-2 test result. Therefore, post-vaccination infections may be undercounted.

Community case totals and information

Click the link above for information about community cases in Carroll County, not including congregate living facility cases.

Congregate Living Facility case totals and information

Click the link above for active outbreaks and total cases in county facilities.

For information on cases in Maryland, visit

State information from the Maryland Department of Health (MDH)

Frequently Asked Questions: Guidance for Schools About the Novel Coronavirus (COVID-19)

U.S. Information from the Centers for Disease Control and Prevention (CDC)

Global information from World Health Organization (WHO)

Carroll County’s COVID-19 call center line is 410-876-4848 and is open 8-5 , Monday-Friday. After hours, people can leave a message that will be returned the next business day. For hotline and website information in different counties, visit our County Health Department COVID-19 Hotlines and Websites Page