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Published on: Jul 09, 2020
2 minute read
By: Dr Rakesh Choudhary

COVID- 19 Tests – What Do You Need To Know?

COVID- 19 tests – What do you need to know?

Author: Dr. Rakesh Choudhary MBBS, MS, FRCS UK, FRCS Orth UK, MChOrth UK.

Dr. Choudhary is a practicing consultant surgeon in the UK.

So many of us think it is not their job to learn about COVID-19 tests and this should be left for the experts and governments to decide about these tests. But I strongly suggest the public must have a basic understanding of these tests which they may have to have themselves.

Basically there are two types of tests, one which can detect the virus in the body and the other one which tells if the person had the previous infection.

Virus test

The virus test detects an active infection. It detects the genetic material (RNA) of the virus during an active infection. It is also called a PCR (polymerase chain reaction) test or nucleic acid test and is sometimes inaccurately called an antigen test.

A swab is taken from deep in the back of your throat and deep in the nose. The swab should go deep up to 7-8 cm and is generally uncomfortable for the patient. Swabbing patients using the correct technique is paramount in ensuring an accurate result. By simply swabbing the inside of the nasal passage is not deep enough to verify that the virus is present.

What does virus testing tell you?

This test tells us if a patient is actively infected with the COVID-19 virus. Virus testing is used mainly for the diagnosis of COVID-19.

When should it be done?

The virus test works best during the first seven days of symptoms.

The coronavirus can be detected in swabs even before symptoms of illness first appear . This is why people can be infectious for a few days before the onset of symptoms, which usually appear about 5 days after the virus infects. Some people have no symptoms throughout their infection but are positive on the virus test and infectious to others. After a few days of illness, the concentration of the virus falls (as seen in swab samples) and the symptoms of the illness usually recede.

Accuracy of the test

In a person with COVID-19, the test is less likely to give a positive result late in the course of infection once the virus has been cleared by the immune system, or if an inadequate sample is taken from the nose or throat. There are concerns that the rate of ‘false negative’ test results could be as high as 30% and a significant number of people are wrongly being told they do not have the virus.

Antibody test

Antibody tests check your blood by looking for antibodies, which may tell you if you had a past infection with the virus that causes COVID-19. Antibodies are protein structures that are produced by the immune system in response to certain infections. The antibody can help fight off infections and can provide protection against getting that disease again (immunity). Antibodies are disease-specific. For example, measles antibodies will protect you from getting measles if you are exposed to it.

The antibody test detects the presence of antibodies as a marker of past infection. The antibody test (blood test) will only detect infections after the immune system has produced antibodies that recognize the virus. This happens approximately 7–10 days after symptoms develop.

Tests carried out a week after a patient develops symptoms will detect only 30% of people who had COVID-19 infection. Accuracy increases to 72% at two weeks and to 94% in the third week. Some people may take even longer to develop antibodies, and some people who are infected may not ever develop antibodies.

Interpretation of the antibody test is complex for non-medical people. Basically having antibodies to the virus that causes COVID-19 may provide protection from getting infected with the virus again. If it does, we do not know how much protection the antibodies may provide or how long this protection may last.

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The Rise of Telemedicine: Revolutionizing Healthcare

In today’s fast-paced world, convenience is key. From online shopping to digital banking, everything is just a click away. The healthcare industry is no exception to this digital revolution, with telemedicine emerging as a game-changer. This new wave of healthcare delivery has not only made medical consultations more accessible but also provided timely care to patients, especially in remote areas. In this blog, we will explore the rise of telemedicine, its benefits, challenges, and the role it plays in shaping the future of healthcare.

What is Telemedicine?

Telemedicine refers to the use of digital technology, such as video calls, phone calls, or messaging apps, to provide healthcare services remotely. Through telemedicine platforms, patients can consult with doctors, discuss symptoms, receive medical advice, and even get prescriptions – all without stepping out of their homes. While the concept of remote healthcare isn’t entirely new, it has gained significant traction in recent years due to advancements in technology and the widespread use of smartphones and internet connectivity.

The Growth of Telemedicine

The COVID-19 pandemic served as a major catalyst for the widespread adoption of telemedicine. With lockdowns and social distancing measures in place, many people were unable or reluctant to visit hospitals or clinics. As a result, healthcare providers turned to telemedicine as a safe and effective way to continue offering care to their patients.

However, even before the pandemic, telemedicine was growing. Factors such as a shortage of healthcare professionals, long waiting times, and the rising cost of healthcare made remote consultations an attractive option. According to a report by McKinsey, telehealth usage in the U.S. increased by 38 times from pre-pandemic levels. Globally, the telemedicine market is expected to grow at a compound annual growth rate (CAGR) of 25.8% from 2020 to 2027.

Benefits of Telemedicine

The rise of telemedicine has brought numerous benefits for both patients and healthcare providers:

1. Increased Access to Care

Telemedicine has made healthcare more accessible, especially for those living in rural or remote areas where access to healthcare facilities is limited. With just a smartphone and an internet connection, patients can connect with healthcare professionals from anywhere, breaking down geographical barriers.

2. Convenience and Time-Saving

For many people, visiting a doctor’s office involves time-consuming travel and long waits. Telemedicine eliminates the need for physical travel, allowing patients to schedule consultations at a time that suits them. This is particularly useful for those with busy schedules, elderly patients, or individuals with mobility issues.

3. Cost-Effective Healthcare

Telemedicine can be a more affordable option for both patients and healthcare providers. Remote consultations typically cost less than in-person visits, and patients save on transportation and other associated expenses. For healthcare providers, telemedicine can help reduce overhead costs by minimizing the need for physical office space and staffing.

4. Continuity of Care

Telemedicine helps patients stay connected with their healthcare providers even when face-to-face visits are not possible. This is particularly important for patients with chronic conditions who require regular monitoring and follow-ups. Remote consultations allow doctors to track their progress and adjust treatment plans without the need for frequent clinic visits.

5. Reduced Risk of Infections

During outbreaks of contagious diseases, such as COVID-19, visiting a hospital or clinic can increase the risk of infection. Telemedicine provides a safer alternative by allowing patients to receive care from the comfort of their homes, thus reducing the spread of diseases.

Challenges Facing Telemedicine

While telemedicine offers many benefits, it also comes with its fair share of challenges:

1. Technology Barriers

Not everyone has access to the internet or the necessary devices for telemedicine consultations. In rural or underserved communities, limited internet connectivity can hinder access to remote healthcare services. Additionally, older adults or those who are not tech-savvy may struggle to navigate telemedicine platforms.

2. Lack of Physical Examination

Telemedicine works well for consultations, but it cannot replace the need for physical examinations in certain cases. While doctors can provide advice based on a patient’s symptoms, there are limitations when it comes to diagnosing conditions that require hands-on assessments or lab tests.

3. Privacy and Security Concerns

Telemedicine relies on the transmission of personal health information over digital platforms. This raises concerns about data privacy and security. Patients need to be assured that their sensitive medical information is protected, and healthcare providers must comply with regulations like the Health Insurance Portability and Accountability Act (HIPAA) to safeguard patient data.

4. Reimbursement and Insurance Issues

In some regions, the reimbursement policies for telemedicine services are not well established. Patients may face difficulties in getting their telemedicine consultations covered by insurance, which can deter them from opting for remote healthcare. On the other hand, healthcare providers may also face challenges in billing for telemedicine services.

The Future of Telemedicine

As technology continues to advance, the future of telemedicine looks promising. With the development of artificial intelligence (AI), wearable health devices, and remote monitoring tools, telemedicine will become more sophisticated and capable of providing personalized care to patients. AI-powered chatbots, for example, could assist doctors in diagnosing conditions by analyzing symptoms and medical history.

Additionally, wearable devices like fitness trackers or smartwatches can monitor a patient’s vital signs in real-time and share the data with their healthcare provider. This continuous flow of information allows for more accurate diagnoses and timely interventions, reducing the need for emergency hospital visits.

Telemedicine in Specialized Care

Telemedicine is also expanding its reach into specialized fields of medicine. For example, telepsychiatry allows mental health professionals to provide counseling and therapy to patients remotely, making mental health services more accessible. Similarly, teledermatology enables dermatologists to diagnose and treat skin conditions by reviewing images sent by patients.

Another emerging trend is the use of telemedicine for post-operative care. Patients recovering from surgery can have follow-up consultations with their doctors without the need for an in-person visit, reducing the burden on both the patient and the healthcare system.

Conclusion

The rise of telemedicine is revolutionizing the way healthcare is delivered. By providing increased access to care, improving convenience, and offering cost-effective solutions, telemedicine is making healthcare more patient-centered and accessible. While challenges such as technology barriers and privacy concerns remain, the continued growth and innovation in telemedicine point towards a future where healthcare is more personalized, efficient, and readily available to all.

As we move forward, telemedicine will continue to play a vital role in bridging the gap between patients and healthcare providers, ensuring that quality care is just a click away.