What is COVID-19 RT-PCR test?
The RT-PCR test identifies COVID-19 by detecting the virus's genetic material through a lab method called reverse transcription polymerase chain reaction (RT-PCR). It is the primary way to detect and track the SARS-CoV-2 virus along with clinical symptoms.
For this test, a medical worker collects a fluid sample by inserting a lengthy nasal swab called a nasopharyngeal swab into the nostril. It gathers fluid from the rear of your nose. Alternatively, a sample might be collected using a shorter nasal swab called a mid-turbinate or brief swab, known as an anterior nares swab. Sometimes, a healthcare provider may even inject a long swab into the back of your throat, called an oropharyngeal swab. You can also provide a saliva sample by spitting it into a tube.
Test results can be ready within minutes when analyzed on-site and take 1 to 3 days if processed at an external lab. A positive COVID-19 test result detects SARS-CoV-2 RNA, confirming infection and presumed contagion. A negative result means no detectable SARS-CoV-2 RNA, which isn't conclusive for COVID-19. Timing affects accuracy when testing for COVID-19 using RT-PCR. The COVID-19 RT-PCR test aims to reduce false positive results, but there's still a chance of such outcomes, even in areas with less than 5% prevalence.
This test is suitable for individuals aged 18 and above (self-collected), 14 and above (self-collected with adult supervision), or two years and above (collected with adult help).
What should you do after a COVID-19 RT PCR test?
After taking a COVID-19 RT PCR test near you, you must wait at least 24 hours before your results. In some cases, it can take a few days after sample collection. During this time, it is best to take hygiene precautions such as wearing a mask and isolating yourself from others until your test results return.
If you get a positive test result, you likely have an infection with SARS-CoV-2. This could be due to an asymptomatic infection. If you have symptoms, then this infection is COVID-19. Most individuals have a mild form of the condition and can recover safely at home without much medical care. Contact your nearest healthcare provider or virtually contact them if your symptoms worsen or you have other concerns. After testing positive, you must continue to take precautions. This is because an infected person can breathe out droplets and microscopic particles that contain the virus, with which others can come in contact.
In some cases, these droplets may contaminate the surfaces they touch. Note that even those individuals who have been vaccinated against this virus can get sick. However, vaccinations significantly reduce the risk of becoming severely ill, hospitalized, or even dying.
Difference between real-time PCR and reverse transcriptase PCR
In 2009, the MIQE (Minimum Information for Publication of Quantitative Real-Time PCR Experiments) guidelines stated that RT-PCR should exclusively refer to reverse transcriptase PCR, not real-time PCR, as is often confused.
RT-PCR involves using RNA instead of DNA as the initial genetic material. It's quite like regular PCR but with an added step that enables the amplification and detection of RNA.
In RT-PCR, RNA is initially reverse-transcribed into a single-stranded copy of complementary DNA (cDNA) with the help of reverse transcriptase. This cDNA, created through reverse transcription, is then amplified by DNA polymerase using standard PCR, resulting in double-stranded cDNA.
On the other hand, qPCR (short for quantitative PCR) is a real-time DNA amplification method known as real-time PCR. It gauges the amount of DNA after each replication cycle by employing a fluorescent probe, like an interacting dye or a hydrolysis-based probe. Primarily, qPCR determines the quantity of a specific DNA sequence and identifies or characterizes pathogens in a sample, all in real time.
What's a PCR test?
PCR stands for polymerase chain reaction. It's a test that identifies genetic material from a specific organism, like a virus. It spots the virus if you currently have it. It can also find bits of the virus even after the infection.
What's a COVID-19 PCR test?
A COVID-19 RT-PCR test is different from a COVID-19 PCR test. The COVID-19 PCR test examines your upper respiratory sample. It is a molecular test that hunts for genetic material (RNA) from SARS-CoV-2, the COVID-19 virus. Scientists use PCR to multiply the RNA into DNA, which is duplicated until the virus shows up if it's there. This test has been the go-to for diagnosing COVID-19 since February 2020. It's dependable and accurate.
What are the most common COVID-19 symptoms?
Most COVID-19 patients get a fever and respiratory issues like cough or breathlessness. Some have mild symptoms or none. The existing information on COVID-19 illness shows symptoms like cough, breathlessness, fever, chills, muscle pain, headache, throat ache, loss of taste/smell, and stomach issues. These signs appear 2-14 days after virus exposure, usually around the fifth-day mark.
Groups at risk of becoming severely ill from COVID-19
Some individuals are more likely to fall severely ill and become hospitalized from contracting the COVID-19 virus compared to others. The risk for developing severe COVID-19 depends not only on a person's health status, age, and activities but also on other factors like where a person lives, works, learns, economic stability, and how easy it is for them to get medical care. Critical COVID-19 illness may require assistive mechanical breathing and also lead to death.
The following are at high risk of severe COVID-19 illness:
- People aged 65 years or older.
- Babies aged six months or younger. Babies this young are not eligible for the COVID-19 vaccine and are therefore at higher risk.
- People with previous respiratory illnesses such as asthma, COPD, or lung disease.
- Individuals with cancer are also prone to getting sick for longer if they contract COVID-19.
- An Immunocompromised person who has a weak immune system is also more likely to become critically ill.
- Those who have received an organ transplant or have heart disease, sickle cell anemia, or liver disease are also at high risk.
Preparing for your COVID-19 vaccination
Before getting vaccinated, taking proactive steps is essential to ensure a smooth and safe experience.
Educate yourself about COVID-19 vaccines.
Before getting vaccinated, take the time to understand how different COVID-19 vaccines work and how the vaccination process is being rolled out in South Asia. Use credible sources such as your country's Ministry of Health, WHO, or UNICEF for reliable information. Cross-check any online content, especially from unknown or unofficial sources. If you have questions or concerns, speak to a nearby health worker or visit your local health facility for guidance.
Take an RT-PCR test if necessary.
Many vaccination centers recommend or require a COVID-19 RT-PCR test, especially if you've had symptoms recently or been exposed to a positive case. Getting tested ensures you are not carrying the virus to the vaccination site, protecting others, and complying with safety protocols.
Get your essentials ready
Make sure you're fully prepared before leaving home. Pack:
- Hand sanitizer
- Your appointment notification
- A valid ID (as required in your country)
- A mask that wraps tightly around your nose and mouth
- A travel plan to reach the vaccination site on time
- Loose or short sleeves for easy vaccine administration
Inform the healthcare personnel if you have any pre-existing medical issues or are presently using any medications, especially pain relievers.
Reschedule if you're unwell.
If you have COVID-19 or experience symptoms such as fever, cough, or loss of taste/smell on the day of your appointment, do not visit the vaccination site. Notify the vaccination center via phone, message, or email. You can safely get vaccinated after 14 days since your symptoms ended.
Follow safety guidelines at the center
While waiting in line or inside the vaccination center, always:
- Wear your mask properly and avoid touching it.
- After touching a surface, wash your hands or sanitize them.
- Maintain a distance of at least one meter from others.
- Avoid touching your face.
How can you find a provider offering COVID-19 RT PCR tests near you?
When it comes to finding an RT-PCR test, Zocdoc has you covered. The Zocdoc app simplifies the process, letting you quickly refine your search. You can filter practitioners by specialty, your concerns, appointment preferences, location, zip code, and insurance availability. Just provide your information, and Zocdoc will tap into its extensive database to find the best matches for you. Whether you're looking for an in-person or virtual appointment, Zocdoc makes scheduling hassle-free.
Zocdoc profiles for each practitioner provide detailed insights into their training, experience, and practice approach. You can access this information by clicking on the doctor's name. These profiles offer a comprehensive view of each doctor's background, from training years and areas of expertise to qualifications, licenses, affiliations, and achievements. Practical details like gender, preferred languages, location, and business hours are all covered.
Zocdoc will also help you find healthcare providers and doctors who provide COVID-19 RT PCR tests near you. To find an in-network provider, choose your insurance carrier and plan from the dropdown menu on the website, or upload a photo of your insurance card if you cannot find your particular plan. If you choose to upload a photo of your insurance card, Zocdoc will scan the image and show you your likely plan. This applies only to medical insurance cards, not dental or vision. If you are having trouble uploading your card, contact Zocdoc's service team, which is available 365 days a year via chat or email. If you have other questions about insurance, make sure you go through Zocdoc's patient help center.
You'll also find genuine patient reviews and ratings on Zocdoc's provider pages, helping you make an informed choice. With Zocdoc, making appointments is straightforward, secure, and doesn't cost you anything. Discover the convenience today!
Zocdoc is also secure and 100% free!
COVID-19 test statistics
The number of daily reported COVID-19 tests in the county increased rapidly from February to May 2020. In February 2020, more than 350,000 tests were reported. By May, over 3 million tests were reported. This represents an increase of over 750% in the number of daily reported tests in just over two months in the U.S. during the peak flare of COVID-19.
The 7-day average number of tests increased from around 500,000 tests per day in February 2020 to over 1 million tests per day in May 2020. This represents an increase of over 100% in the 7-day average number of tests in just over two months.
Since March 2021, the number of daily reported tests in the country has declined significantly from its peak in May 2020. The 7-day average number of tests dropped to around 700,000 per day in March 2021, compared to over 2 million tests per day in May 2020.
Sources
Mayo Clinic[1]
Pulmonary Chronicles
The COVID Tracking Project
Portland Press
AAT Bioquest, Inc.
Food and Drug Administration[1]
Food and Drug Administration[2]
Cleveland Clinic
Mayo Clinic[2]
Centers for Disease Control and Prevention[1]
Centers for Disease Control and Prevention[2]
UNICEF
