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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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How to Prevent Food Poisoning in Monsoon

Monsoon brings relief from the heat—but along with cool breezes and rains come increased chances of infections, especially food poisoning. The high moisture in the air creates a perfect breeding ground for bacteria, making food more likely to spoil and cause illness.

In this article, we’ll help you understand how to stay safe with easy, practical tips on how to prevent food poisoning in monsoon.

Why Is Food Poisoning So Common in Monsoon?

The damp and humid conditions during the rainy season promote bacterial and fungal growth. This contamination can easily affect the food we eat and the water we drink.

Common causes of food poisoning in monsoon include:

Eating contaminated street food
Drinking unfiltered or untreated water
Improper storage or refrigeration
Eating undercooked or reheated leftovers

Symptoms can range from mild stomach pain to vomiting, diarrhea, and fever—and can become serious if not treated on time.

How to Prevent Food Poisoning in Monsoon: Easy Tips

Let’s go step by step into what you should do (and not do) during this season to avoid foodborne illness:

1. Avoid Street Food and Raw Salads

Street vendors often use unclean water and keep food exposed to dust, flies, and pollution. In monsoon, this risk becomes even higher.

What to avoid:

Chaat, golgappas, sandwiches from carts
Cut fruits or raw vegetables sold outside
Juices from roadside stalls

Instead, eat home-cooked meals where you can control the hygiene.

2. Drink Only Boiled or Purified Water

Unfiltered water is a major cause of stomach infections during monsoon. Make sure your drinking water is:

Boiled for 10 minutes, or
Filtered using a RO/UV purifier, or
Packaged from a trusted brand

Avoid consuming water-based drinks like sherbets or ice made with unclean water.

3. Eat Fresh and Hot Food

In monsoon, bacteria multiply quickly. Avoid eating food that has been left out for hours.

Tips:

Eat freshly cooked meals while still warm
Avoid reheating food multiple times
Don't leave cooked food at room temperature for more than 2 hours

4. Refrigerate Perishables Quickly

Your fridge is your best friend in this season—but only if you use it right.

Refrigeration tips:

Store cooked food in airtight containers
Don't keep raw meat and vegetables together
Use leftovers within 24 hours
Check for expired or spoiled food regularly

5. Clean Fruits and Vegetables Properly

Rainwater often brings mud and germs to fresh produce. Even greens from the market can carry bacteria and insect eggs.

Cleaning tips:

Wash produce thoroughly with clean water
Use salt water or vinegar soak for 10–15 minutes to disinfect
Peel fruits like mangoes and bananas before eating
Avoid leafy vegetables that are difficult to clean, like spinach and lettuce

6. Practice Good Kitchen Hygiene

Contamination often starts in your kitchen.

Hygiene habits to follow:

Wash hands before and after handling food
Keep utensils and chopping boards dry and clean
Don't let water collect on kitchen surfaces
Wash dish cloths and sponges regularly

Related Health Checkups to Consider

If you're experiencing stomach problems or want to monitor your digestive health during monsoon, these lab tests (available via SecondMedic powered by Thyrocare) may help:

???? Complete Blood Count (CBC)

Checks for infections or inflammation.

???? Stool Routine & Culture Test

Detects bacterial infections, parasites, or digestive disorders.

???? CRP Test (C-Reactive Protein)

Shows whether your body is fighting an infection.

???? Food Intolerance Test

For people with recurring food-related digestive issues.

All tests come with home sample collection and online report access at www.secondmedic.com.

Foods You Can Eat During Monsoon

Here are some healthy, safe food choices during the rainy season:

Warm soups and khichdi – light and easy to digest
Steamed vegetables – safer than raw
Ginger tea – helps digestion
Turmeric milk – natural immunity booster
Boiled eggs or well-cooked lean meat

Avoid oily, uncooked, or refrigerated food that’s more than a day old.

Conclusion

Monsoon brings beauty, but also bacteria. Staying safe is all about being smart with your food and water. By following simple hygiene rules and eating fresh, clean food, you can enjoy the season without worrying about stomach issues.

Be alert, eat smart, and protect your family by following these tips on how to prevent food poisoning in monsoon.

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