When you start feeling under the weather—perhaps with a fever or a cough—it is natural to worry, “Is this COVID-19?” That feeling is completely normal. However, rather than worrying, the best and most reliable way to confirm if you have the virus is to get a test. Today, we will discuss the types of COVID tests available, who should get tested, and what steps to take once you receive your results.
Who Should Get a COVID Test?
Generally, it is highly recommended to get tested in the following situations:
- If you have COVID-19 symptoms: It is wise to get tested immediately if you experience fever, cough, or shortness of breath.
- If you have been in close contact with someone who tested positive: If a family member, friend, or colleague is confirmed to have COVID-19, you should also get tested. Keep in mind, if you are asymptomatic, the most accurate results are obtained by testing at least 5 days after your exposure.
- If you are planning to travel: Many countries require a negative COVID-19 test report for entry. Check the specific travel regulations for your destination well in advance.
Some individuals may be infected with COVID-19 without showing any symptoms at all. If you have any doubt, getting tested is the best course of action.
| Dry cough | Difficulty breathing or shortness of breath |
| Muscle or body aches | Severe fatigue |
| Loss of taste or smell | Sore throat |
| Congestion or runny nose | Nausea, vomiting, or diarrhea |
| Fever or chills | Headache |
What Are the Types of COVID Tests?
There are two primary tests used to detect the `SARS-CoV-2` virus that causes COVID-19.
1. PCR tests (Molecular tests)
2. Rapid Antigen tests
What is a PCR test?
This is the most accurate and reliable diagnostic tool, often referred to as the “gold standard.” It works by detecting the virus's genetic material (RNA) from a nasal or throat sample in a laboratory setting.
A swab is inserted into your nasal passage and rotated to collect the sample. While this can feel uncomfortable, it is not painful. You typically receive the results within 24 hours or longer.
What is a Rapid Antigen Test (RAT)?
This is often referred to as a “self-test” or home test. It detects specific antigen proteins on the surface of the virus. Similar to a home pregnancy test, you collect your own sample, mix it with the provided solution, and can see the result in a matter of minutes.
| Feature | PCR Test | Rapid Antigen Test (RAT) |
|---|---|---|
| Accuracy | Very high. Can detect even tiny amounts of the virus. | Good. However, it can sometimes produce a ‘false negative’ result. |
| Speed | Takes 24 hours or longer. | Results in 15-30 minutes. |
| Where it is done | Only at hospitals or medical laboratories. | Can be done at home. |
Antibody Test
This is different from the tests mentioned above. It requires a blood draw and checks for antibodies your body may have developed against the virus. This test shows whether you have previously had the infection, rather than whether you have an active, current infection.
What To Do With Your Results
Your next steps depend on your test outcome.
If the result is Positive
This means the virus was detected. Please take the following steps:
- Notify your doctor immediately. If you are older or have underlying health conditions like diabetes or heart disease, medical guidance is vital.
- Stay home, except to seek necessary medical care. This is essential to prevent the spread of the virus to others.
- Stay isolated from others in your household; if possible, use a separate room and bathroom.
- If you must be around others, wear a mask.
- Do not share personal items like dishes, cups, or towels.
- Cover your coughs and sneezes, and wash your hands frequently with soap and water.
- Notify anyone you have been in close contact with recently.
You can end isolation after your symptoms improve and you have been fever-free for at least 24 hours without the use of fever-reducing medication. It is still recommended to wear a mask around others for an additional 5 days as a precaution.
If the result is Negative
This means the virus was not detected at the time of testing. If you are asymptomatic, you likely do not have COVID. However, if you used a rapid antigen test, there is a possibility of a “false negative.”
If you receive a negative result but continue to experience symptoms, it is best to consult your doctor, who may recommend a confirmatory PCR test.
When Is It an Emergency?
Regardless of whether you have confirmed COVID-19, seek immediate care at an emergency department if you experience any of the following:
- Severe difficulty breathing
- Persistent chest pain or pressure
- Confusion or altered mental state
- Inability to wake or stay awake
- Pale, gray, or blue-colored skin, lips, or nail beds
Key Takeaways
- Get tested if you have symptoms or have been in close contact with someone who tested positive.
- PCR tests are the most accurate. Rapid Antigen Tests are fast but can produce false negatives.
- If positive, stay isolated at home and contact your healthcare provider.
- Even with a negative result, continue to follow medical advice if symptoms persist.
- Seek emergency care immediately for severe symptoms like breathing difficulties or chest pain.
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