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Published on: Jul 07, 2020
2 minute read
By: Dr Rajan Choudhary

Asymptomatic COVID Infections – Are You Safe?

Asymptomatic COVID infections – are you safe?

Patients with COVID usually exhibit signs of coughing, fever, and fatigue. This can develop into further respiratory problems including difficulty breathing, pneumonia in both lungs, and in severe cases the need to ventilate a patient in an intensive care setting. But what if you are asymptomatic? Do you need to worry? Surely you get the benefits of immunity without the dangers of life-threatening symptoms.

In our previous blog, we discussed how a study showed 41% of people with COVID were asymptomatic. However, they had the same viral load as their symptomatic counterparts. This paper published in Nature Medicine suggests that even the asymptomatic patients developed signs of lung inflammation without showing any outward symptoms. Could asymptomatic patients still be damaged by COVID? It's not easy to study this subset of patients, as they do not get tested routinely or present to hospital for examination or investigation.

This study looked at 37 individuals in the Wanzhou District who were diagnosed with COVID via swab test but did not show any symptoms before the test or during hospitalization. These patients were found through the extensive contact tracing program set up in Central China. Whilst in hospital 57% showed abnormalities in the lung fields on a CT scan, including the “ground glass” appearance classic for COVID pneumonia. These changes could be due to fluid or blood in the area or due to inflammation caused directly by the infection.

What does this mean for the individual in the long term? This is difficult to say, especially since COVID has only been around for a few months so long term follow up is simply impossible to state accurately. Depending on the size and severity of the inflammation it may resolve spontaneously with no lasting damage, or the inflammation could cause scarring of the lung tissue that only becomes evident several years or decades down the line. It's difficult to tell.

The study also looked at two other factors in these patients. Compared to their symptomatic counterparts, asymptomatic patients were found to shed viral particles for several more days. It is unclear the significance of this, or whether this makes them more infective or prone to transmitting the infection for a longer period of time. It does add support to the theory asymptomatic people should not believe themselves exempt from spreading the infection.

Secondly, the study looked at the prevalence of antibodies present in the patient's blood. These antibodies can be used as a surrogate for immunity. In theory, after infection occurs our body has the ability to rapidly produce these antibodies against the virus in the event of a second infection. This would neutralize the infection before it could develop into a serious disease.

Looking at these antibodies the researchers found antibody levels against the SARS and MERS virus to last over 2 years. However, against SARS-CoV-2, the antibody levels fall within 2-3 months, providing only a short duration of immunity. This is worrisome for individuals and countries hoping to achieve herd immunity or at least immunity to the virus after a mild or asymptomatic infection.

So what should we take away from this? Perhaps an asymptomatic infection is not the perfect scenario. Damage does occur to your lungs, albeit temporary damage. You are still able to spread it to vulnerable people. And your immunity may not last as long as other infections.

Therefore be safe. Maintain social distancing, follow government advice on wearing a mask. And if you can, avoid excessive socializing or close contact with lots of other people. The virus hasn’t gone away, and it is still dangerous.

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Lipid Profile Test – Normal Range and Risks

Keeping your heart healthy isn’t just about staying active or eating green veggies. It also means knowing what’s going on inside your body—especially your cholesterol levels. One of the best ways to track this is through a lipid profile test.

If you’re wondering what this test means, what the numbers should be, and what risks you face if they're abnormal—this blog is for you.

Let’s dive into lipid profile test – normal range and risks in easy and clear language.

What Is a Lipid Profile Test?

A lipid profile test is a blood test that measures the amount of fat (lipids) in your blood. These lipids include different types of cholesterol and triglycerides.

The test helps evaluate your risk of heart disease, stroke, and clogged arteries.

What Does the Lipid Profile Test Measure?

A complete lipid profile usually measures:

Total Cholesterol – the overall amount of cholesterol in your blood
LDL (Low-Density Lipoprotein) – the “bad” cholesterol that can block arteries
HDL (High-Density Lipoprotein) – the “good” cholesterol that protects your heart
Triglycerides – a type of fat that provides energy but can cause heart issues in high amounts

Sometimes, the test also calculates VLDL and a cholesterol/HDL ratio to better assess your health risks.

Lipid Profile – Normal Range

Understanding what your numbers mean is key. Here are the recommended normal ranges:

Test Component	Normal Range
Total Cholesterol	Less than 200 mg/dL
LDL (Bad Cholesterol)	Less than 100 mg/dL
HDL (Good Cholesterol)	40 mg/dL or more (men), 50+ (women)
Triglycerides	Less than 150 mg/dL

Note: Values may vary slightly depending on labs and age. Always consult your doctor for interpretation.

Why Is This Test Important?

High cholesterol usually shows no symptoms. That’s why it's called a silent threat.

Your arteries may slowly get clogged without you knowing it, increasing the risk of:

Heart attacks
Strokes
Peripheral artery disease
High blood pressure

A lipid profile gives an early warning so you can make timely changes to protect your heart.

Risks of Abnormal Lipid Profile

Here’s what happens when the results are not in the normal range:

High LDL Cholesterol

Builds plaque in your arteries
Increases risk of heart attack or stroke

Low HDL Cholesterol

Reduces protection for your heart
Makes it easier for bad cholesterol to stick to artery walls

High Triglycerides

Can lead to pancreatitis and diabetes
Often linked with obesity and poor lifestyle

High Total Cholesterol

General risk marker for cardiovascular diseases

Causes of High Cholesterol or Triglycerides

Unhealthy diet (high in fried, fatty, and sugary foods)
Lack of physical activity
Smoking and alcohol consumption
Obesity
Diabetes or thyroid problems
Genetic/family history of high cholesterol

How to Improve Your Lipid Profile Naturally

If your test results are abnormal, you don’t always need medicine right away. Often, small changes in your lifestyle can bring big improvements.

Eat a Heart-Healthy Diet

Choose whole grains, fruits, vegetables, and lean proteins
Avoid processed food, red meat, and fried items
Include omega-3 rich foods like fish, flaxseeds, and walnuts

Exercise Regularly

30 minutes of walking, yoga, cycling, or swimming at least 5 days a week

Quit Smoking & Limit Alcohol

These habits lower HDL and increase LDL

Maintain a Healthy Weight

Losing even 5–10% of body weight can improve lipid levels

How and When to Take the Lipid Profile Test

When to Take:

Once every 12 months for adults above 30
More often if you have heart disease, diabetes, obesity, or a family history

Fasting Required?

Yes, you should fast for 8–12 hours before giving the blood sample for the most accurate results.

Can I Get This Test at Home?

Yes! Platforms like SecondMedic.com offer home sample collection for the Lipid Profile Test, powered by trusted labs like Thyrocare.

You just book the test online, and a technician collects the sample from your doorstep. Results are available digitally within 24–48 hours.

Total cholesterol over 240 mg/dL, LDL over 160 mg/dL, and triglycerides over 200 mg/dL are considered high-risk levels.

Conclusion

A lipid profile test is a simple yet powerful tool that gives deep insights into your heart health. Knowing the normal range and understanding the risks of abnormal levels can help you take control early and live a longer, healthier life.

Stay proactive about your health. Book a lipid profile test – normal range and risks checkup today and make heart-smart choices.

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