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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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Foods to Avoid During Rainy Season in India: Stay Safe and Healthy!

The rainy season brings a welcome relief from the scorching summer heat. The smell of wet soil, cool breeze, and refreshing showers make it a favorite season for many. However, monsoons also increase the risk of infections, especially waterborne and foodborne illnesses. That’s why what you eat during the rainy season plays a huge role in keeping you healthy.

In this blog, we’ll talk about foods to avoid during rainy season in India to protect your stomach and boost your immunity. Whether you enjoy street food or homemade delicacies, knowing what to skip is essential for a safe and sickness-free monsoon.

Why You Need to Be Careful About Food During Monsoon

The rainy season creates a moist environment, which is perfect for the growth of bacteria and fungi. Roads are often flooded, drains are clogged, and food hygiene can easily be compromised. The digestive system also becomes weak during this time, so heavy or contaminated food can lead to infections, stomach upset, food poisoning, diarrhea, and more.

So, let’s look at the foods that you should stay away from during the monsoon.

1. Leafy Vegetables

While leafy greens like spinach, cabbage, and lettuce are normally very healthy, they are not the best choice during the rainy season. These vegetables are often grown in muddy soil and can carry a lot of dirt and germs. Washing them properly becomes difficult, and consuming them raw or undercooked may cause stomach infections.

Tip: If you must eat leafy greens, cook them well and avoid raw salads.

2. Fried Street Food

Who doesn’t crave hot samosas, pakoras, or kachoris with chai on a rainy day? But street food is one of the main culprits behind monsoon sickness. The oil used is often reused multiple times, making it toxic. The preparation area may not be hygienic, and food is exposed to open air, flies, and moisture, leading to contamination.

Tip: Make your favorite fried snacks at home using fresh oil and clean ingredients.

3. Raw Sprouts

Sprouts are packed with nutrients, but they are not safe during the monsoon. The humid weather encourages bacterial growth, especially salmonella and E. coli, in raw sprouts. They can easily lead to food poisoning or stomach infections.

Tip: Lightly steam sprouts before eating, or skip them altogether during this season.

4. Seafood

Monsoon is breeding season for fish and other seafood. This means there’s a higher risk of consuming contaminated or stale seafood. Improper storage or transportation during the humid months makes things worse. Eating such seafood can lead to stomach infections and even serious food poisoning.

Tip: Avoid seafood during the rainy season, and switch to fresh vegetarian or poultry options instead.

5. Pre-Cut Fruits and Juices from Outside

It’s common to find vendors selling sliced fruits or fresh juices on the roadside. But consuming pre-cut fruits or open juices during monsoon is a big no-no. These are exposed to air and flies, and often cut with unclean knives or on dirty surfaces.

Tip: Always wash fruits at home and cut them fresh. Drink homemade juices only.

6. Dairy Products That Spoil Easily

Products like paneer, cream, or curd spoil quickly in humid weather. If not stored properly, they can go bad without showing any obvious signs and lead to food poisoning or stomach discomfort.

Tip: Consume dairy items fresh and avoid buying in bulk during the monsoon.

7. Fermented Foods

Idli, dosa batter, and other fermented items may not ferment properly due to excessive moisture in the air. Improper fermentation can lead to the growth of harmful bacteria and result in acidity, bloating, or even diarrhea.

Tip: Prepare small portions and consume them immediately. Avoid keeping batter for long hours.

8. Carbonated Drinks and Ice

Cold drinks and soda may feel refreshing, but they can weaken digestion. Also, ice cubes used in beverages (especially from roadside stalls) are often made from contaminated water, leading to infections like typhoid or hepatitis A.

Tip: Stick to warm water, herbal teas, or freshly boiled and cooled water to stay hydrated.

9. Mushrooms

Mushrooms grow in damp, dark environments and are prone to bacterial or fungal contamination. During the rainy season, the chances of toxic or wild mushrooms entering the supply chain increase.

Tip: If you love mushrooms, make sure to buy them from a trusted source and cook them thoroughly.

Bonus: What to Eat Instead?

To stay safe and healthy during the monsoon, focus on these safer alternatives:

Steamed and cooked vegetables
Seasonal fruits like apples, pears, and pomegranates
Light soups and broths
Boiled water
Home-cooked meals with minimal oil
Herbs like tulsi, ginger, and turmeric to boost immunity

Monsoon Health Tips

Here are a few extra tips to maintain good health during the rainy season:

Wash fruits and vegetables with salt or vinegar water.
Dry grains and pulses before storing to avoid fungal growth.
Use spices like pepper, asafoetida (hing), and ajwain to improve digestion.
Keep your kitchen and storage areas dry to prevent mold.

Conclusion

The rainy season is beautiful but also brings health challenges. By knowing what to avoid, you can enjoy the monsoon without worrying about falling sick. Hygiene, clean cooking, and smart food choices are your best friends during this season.

Remember, prevention is better than cure—especially when it comes to your diet. So, if you want to enjoy the rains without health worries, make sure to follow this guide on foods to avoid during rainy season in India.

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