At-Home Rapid COVID Testing
At-Home Rapid COVID-19 Testing
First, here's what the CDC has to say about COVID-19 testing
Expiration Dates
-Check the expiration date on your test kit.
- Some manufacturers have extended expiration dates. To find the most up to date information, check the manufacturer's website for BinaxNOW and InteliSwab brand test kits.
How can I get a free at-home COVID test kit?
Baltimore City Health Department is distributing COVID test kits:
- Test kits are available at some Enoch Pratt Free Library locations. Test kits are available during operating hours of the libraries, while supplies last. You can see a list of which branches have kits available here.
At all locations, test kits are available in limited quantities, on a first-come-first-served basis.
What are self-tests?
Self-tests also called home tests or over-the-counter tests, are COVID-19 tests that can be taken anywhere and produce rapid results.
These tests are often sold or given directly to individuals and can be used by people at their homes, or any location. They do not need to be performed in a doctor’s office or COVID testing site.
The results are ‘rapid’ or available right away. No samples need to be sent to a lab.
More information on self-tests can be found here:
What types of self-tests does Baltimore City Health Department distribute?
Currently, Baltimore City is distributing BinaxNow and InteliSwab test kits.
COVID-19 tests are rapid antigen tests that can be done at home by individuals.
These tests can be used for people with and without symptoms, regardless of vaccination status.
More information on each test, including instructions on how to use them and links to videos on how to use them, are below.
| Type of At-Home Test | ||||
| Acon FlowFlex | Abbot BinaxNow | DiatTrust Celltrion | iHealth | InteliSwab |
Type of test | Rapid Antigen test | Rapid Antigen test | Rapid Antigen Test | Rapid Antigen Test | Rapid Antigen Test |
What ages can use this test? |
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Sample collection | Nose swab at front of the nose | Nose swab at front of the nose | Nose swab at middle of nose | Nose swab at front of nose | Gentle shallow nasal swab |
How long does it take for results to be ready | 15 minutes | 15 minutes | 15 minutes | 15 minutes | 30 minutes |
How many kits are in each box? | 1 kit per box | 2 kits per box | 2 kits per box | 2 kits per box | 2 kits per box |
How do I use the kits in someone with symptoms of COVID-19? | Best used within 7 days of when symptoms started | Best used within 7 days of when symptoms started | Best used within 7 days of when symptoms started | Best used within 7 days of when symptoms started | Individuals with symptoms of COVID-19 and initial negative results should be tested again after 48 hours. |
How do I use the kits in someone without symptoms of COVID-19? | Only 1 kit is needed. Repeat testing, or serial testing, is not needed for FlowFlex | Use twice over 3 days, with at least 24 hours and no more than 48 hours between tests.
(Use one card on day 1, and the second card on day 3.) | Use twice over 3 days, with at least 24 hours and no more than 48 hours between tests.
(Use one card on day 1, and the second card on day 3.) | Use twice over 2 days, with at least 24 hours and no more than 48 hours between tests. (Use one card on day 1, and the second card on day 2 or 3). | Individuals without symptoms of COVID-19, and with initial negative results, should be tested again after 48 hours and, if the second test is also negative, a third time after an additional 48 hours. |
How do I use the Acon FlowFlex test?
Click for instructions for the Acon FlowFlex ENGLISH SPANISH
Click here for videos on how to use the Acon FlowFlex test kit
Click here for the FlowFlex Quick Reference Guide
How do I use an InteliSwab test?
Click for instructions for the InteliSwab ENGLISH SPANISH
Click here for a video on how to use the InteliSwab test kit
How do I use an Abbot BinaxNOW™ test?
Click for instructions for the Abbot BinaxNow ENGLISH/SPANISH
Click here for videos on how to use the Abbot BinaxNow test kit
(Scroll to the bottom of the page)
How do I use a Diatrust Celltrion test?
Click for instructions for the Diatrust Celltrion ENGLISH SPANISH
Click here for videos on how to use the Diatrust Celltrion test (scroll mid-way through the page)
How do I use an iHealth test?
Click for instructions for the iHealth test kits ENGLISH SPANISH
Click here for videos on how to use the iHealth test (scroll mid-way through the page)
Who should use a self-test?
You can use a self-test if you have any COVID-19 symptoms or have been exposed to someone with COVID-19.
Even if you don’t have symptoms or have not been exposed to COVID-19, using a self-test before gathering indoors with others can give you information about the risk of spreading COVID-19. This is especially important before gathering with unvaccinated children, older individuals, those who are immunocompromised, or individuals at risk of severe disease.
The test kit is designed for personal use only. If you need a documented result for travel, employment, return to school, or other purposes, you should verify whether or not this test will satisfy the testing requirement.
Please be aware of the expiration date on the test kit.
What is the difference between at-home tests and other COVID tests?
Most self-tests are rapid antigen tests. A Rapid Antigen test looks for certain proteins of the virus, which help determine if someone is infectious, or likely to transmit the virus to others.
A PCR test looks for the genetic material of the virus. It is the best test for a highly accurate diagnosis.
More information is available on the different types of testing here:
Where can I get a PCR test?
Find out where you can get a PCR test
What should I do if I test positive?
A positive test result indicates you likely are infected with COVID-19, regardless of your vaccination status. Even if you have no symptoms and feel well, you should assume you are contagious. Next steps:
- ISOLATE at home. Stay away from others for a minimum of 5 days, and wear a mask when around others for at least a total of 10 days.
2. Contact your healthcare provider. Seek follow-up care from your healthcare provider as soon as possible, as you may need additional testing and treatment. Monitor your symptoms and if you have emergency warning signs, seek emergency medical care.
3. Answer the call. If you are called by contact tracers and see “MD COVID” on your phone, answer the call. More information about COVID can be found here:
What should I do if I test negative?
If your test is the Abbott BinaxNOW™, you should use the second test in your kit to test again at least 24 hours, and no longer than 48 hours, after the first test.
If your test is the Flowflex™ test, you do not need to take another test in 1-2 days.
A negative result means the virus that causes COVID-19 is not found in your specimen. It likely means that you do not have COVID-19 if you took the test while you had symptoms and followed all instructions carefully.
However, it is possible for a test to give a negative result in some people who have COVID-19 (this is called a false negative). You could also test negative if the specimen was collected too early in your infection. In this case, you could test positive later during your illness.
Where can I get a COVID vaccine?
