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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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Digital Health Data Security Challenges India: Securing the Future of Digital Healthcare

As India rapidly digitizes its healthcare infrastructure-telemedicine platforms, electronic health records (EHRs), AI systems, and wearable data-security risks have escalated. Digital health data security challenges India are now a top priority because healthcare has become the number one target of cyberattacks worldwide.

A 2024 CERT-In report revealed that cyberattacks on Indian healthcare systems increased by 278% in a single year, making hospitals, telemedicine platforms, and diagnostic networks highly vulnerable.

SecondMedic recognizes the seriousness of these threats and has invested deeply in security infrastructure to protect patient data end-to-end.

1. Why Health Data Is the Most Valuable Target

Medical records contain:

Identity details
Medical history
Financial data
Prescriptions
Insurance information

This makes them more valuable on the dark web than credit card data.

Attackers use stolen health data for:

Fraudulent insurance claims
Blackmail
Illegal medical purchases
Identity theft

2. Major Digital Health Data Security Challenges in India

1. Cyberattacks on Hospitals and Telemedicine Platforms

India saw multiple ransomware attacks affecting:

AIIMS (Delhi)
State health servers
Diagnostic chains

These attacks disrupted services for days.

2. Weak Security in EHR Systems

Many clinics use outdated software with:

Weak passwords
No encryption
No access logs

This makes patient data vulnerable.

3. Telemedicine Data Exposure

Unsecured video calls, unencrypted chats, and public Wi-Fi create high-risk environments.

4. Wearable Device Vulnerabilities

Wearables send data to cloud servers.
Without secure APIs, this data can be intercepted.

5. Lack of Standardized Regulations

Though ABDM is improving the framework, India still lacks:

Standardized encryption enforcement
Strict penalties for breaches
Uniform hospital compliance

3. Compliance Requirements Under ABDM and DPDP Act

India’s Digital Personal Data Protection Act (DPDP 2023) mandates:

Patient consent for data usage
Secure processing
Limited access control
Breach notifications

ABDM governs:

Health IDs
Secure health data exchange
Interoperability standards

SecondMedic follows both frameworks.

4. How SecondMedic Ensures End-to-End Data Security

1. Encryption of All Patient Data

AES-256 encryption
Multi-layer secure cloud storage
Encrypted telemedicine communications

2. Role-Based Access Control

Doctors, administrators, and technical staff have different access rights.

3. Secure API Integrations

Data from labs, wearables, and pharmacies flows through secure, resistant APIs.

4. Regular Security Audits

Pen-testing and vulnerability assessments ensure new threats are patched.

5. Two-Factor Authentication (2FA)

Prevents unauthorized access.

6. Secure Prescription & Report Handling

Digital prescriptions are encrypted and tamper-proof.

5. Building Digital Trust for India’s Healthcare Future

Patients now expect:

Transparency
Security
Clear data usage policies

SecondMedic maintains strict data protection protocols, ensuring that every patient interaction-whether teleconsultation, diagnostic review, or preventive health plan-remains secure and confidential.

Conclusion

Digital health data security challenges India are real and growing. However, with stronger frameworks, advanced encryption, compliance with DPDP and ABDM, and dedicated platforms like SecondMedic prioritizing patient security, India is building a safer digital healthcare ecosystem. Protecting health data is not just a compliance requirement-it is the foundation of patient trust and the future of Indian healthcare.

References

CERT-In Cybersecurity Report 2024
DPDP Act 2023
ABDM Health Data Framework
NITI Aayog - Digital Health Roadmap
Kaspersky Healthcare Cyber Threat Report
Economic Times - Healthcare Cyberattacks India

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