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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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Anemia Diet Plan: What to Eat to Improve Hemoglobin Levels Naturally

Anemia is one of the most widespread nutritional disorders in India, affecting people across age groups. According to NFHS-5 and ICMR data, more than half of Indian women and a significant proportion of men suffer from anemia. While supplements are sometimes required, a structured anemia diet plan plays a central role in preventing and managing the condition.

Anemia occurs when the body lacks sufficient healthy red blood cells or hemoglobin to carry oxygen efficiently. Nutrition is the foundation of hemoglobin production, making dietary correction essential.

Understanding the Nutritional Causes of Anemia

Anemia commonly results from deficiencies of:

iron
vitamin B12
folate

Each nutrient plays a specific role in red blood cell formation.

Iron: The Core Nutrient in Anemia

Iron is a key component of hemoglobin.

Iron deficiency leads to:

fatigue
weakness
pale skin
shortness of breath

ICMR identifies iron deficiency as the leading cause of anemia in India.

Types of Dietary Iron

Heme Iron

Found in animal foods and absorbed efficiently.

Sources include:

eggs
fish
chicken
liver

Non-Heme Iron

Found in plant-based foods and absorbed less efficiently.

Sources include:

spinach
lentils
chickpeas
jaggery
dates

Vitamin C improves non-heme iron absorption.

Role of Vitamin B12 in Anemia

Vitamin B12 is essential for red blood cell maturation.

Deficiency causes:

megaloblastic anemia
nerve symptoms
memory issues

Vegetarians are at higher risk due to limited dietary sources.

Role of Folate

Folate supports:

DNA synthesis
red blood cell formation

Low folate intake worsens anemia, especially during pregnancy.

Foods to Include in an Anemia Diet Plan

Iron-Rich Foods

green leafy vegetables (spinach, amaranth)
legumes and pulses
dates, raisins and figs
jaggery
red meat and eggs

Vitamin C-Rich Foods

citrus fruits
guava
tomatoes
bell peppers

These enhance iron absorption.

Vitamin B12 Sources

milk and dairy products
eggs
fish
fortified cereals

Folate-Rich Foods

green leafy vegetables
beans and peas
peanuts
whole grains

Sample Daily Anemia Diet Plan

Breakfast

vegetable omelette or sprouted moong
citrus fruit or guava

Mid-Morning

soaked raisins or dates
lemon water

Lunch

brown rice or roti
dal or chickpeas
green leafy vegetable sabzi
salad with lemon dressing

Evening Snack

roasted peanuts or chana
fruit rich in vitamin C

Dinner

vegetable curry with paneer or fish
whole wheat roti
lightly cooked greens

Bedtime

warm milk if tolerated

Foods That Reduce Iron Absorption

Certain foods interfere with iron absorption:

tea and coffee
excess calcium
highly processed foods

These should be avoided close to iron-rich meals.

Special Considerations for Women

Women require more iron due to:

menstruation
pregnancy
lactation

NFHS-5 highlights anemia as a major women’s health concern in India.

Anemia in Men and Older Adults

In men and elderly individuals, anemia may signal:

nutritional deficiency
chronic disease
gastrointestinal issues

Dietary correction should be combined with medical evaluation.

When Diet Alone Is Not Enough

Diet may not be sufficient if:

anemia is severe
absorption is impaired
chronic illness is present

In such cases, supplements or treatment of underlying causes is required.

Importance of Regular Blood Tests

Monitoring hemoglobin helps:

assess improvement
guide dietary adjustments
prevent recurrence

Preventive checkups are essential for high-risk groups.

Lifestyle Factors That Support Recovery

Along with diet:

adequate sleep
stress management
regular physical activity

support blood health and recovery.

Preventing Anemia Long-Term

Long-term prevention includes:

balanced meals
iron-rich cooking methods
avoiding excessive junk food
periodic screening

WHO and NITI Aayog emphasize nutrition education as a preventive strategy.

Conclusion

A well-structured anemia diet plan is the cornerstone of improving hemoglobin levels and restoring energy. By including iron-rich foods, supporting nutrients like vitamin B12 and folate, and improving absorption through smart food combinations, anemia can be effectively managed and prevented. Early dietary intervention, supported by regular health monitoring, helps avoid long-term complications and improves overall quality of life.

References

Indian Council of Medical Research (ICMR) – Anemia and Micronutrient Deficiency Reports
National Family Health Survey (NFHS-5) – Anemia Prevalence Data
World Health Organization (WHO) – Nutrition and Anemia Guidelines
Lancet – Micronutrient Deficiency and Public Health Research
NITI Aayog – Poshan Abhiyaan and Nutrition Policy Reports
Statista – Nutrition and Health Trends in India

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