IDSP’s Success Stories: Achievements in Disease Surveillance

When disease outbreaks strike, every minute counts. The ability to detect, track, and respond to health threats can mean the difference between containing an outbreak and facing a widespread epidemic. India’s Integrated Disease Surveillance Programme has built a robust infrastructure that has transformed how the country monitors and responds to disease threats. From establishing surveillance networks across thousands of locations to leveraging technology for real-time disease tracking, IDSP’s achievements represent a significant leap forward in public health preparedness.

Building a nationwide surveillance network 🔗

One of IDSP’s most significant achievements has been the establishment of a comprehensive three-tier surveillance structure that spans the entire country. The programme established a Central Surveillance Unit at the National Centre for Disease Control in Delhi, State Surveillance Units at all state and union territory headquarters, and District Surveillance Units at all district headquarters across India. This hierarchical system ensures that disease surveillance data flows seamlessly from local to national levels.

The Central Surveillance Unit serves as the nerve center of the entire operation, administratively and financially integrated with NCDC. At the state level, each SSU is headed by a State Surveillance Officer and supported by specialized staff including epidemiologists, microbiologists, training consultants, veterinary consultants, data managers, and entomologists. Similarly, District Surveillance Units operate with a District Surveillance Officer supported by district epidemiologists, data managers, and data entry operators who work on the ground to collect and report disease data.

The impact of this infrastructure is evident in the data reporting rates. Presently, about 90% of districts in the country report weekly surveillance data through the portal, providing health authorities with crucial information about disease trends and seasonality. This high participation rate ensures that unusual disease patterns can be detected early, allowing Rapid Response Teams to investigate and control outbreaks before they spread.

Connecting India through information technology 🔗

The technological backbone of IDSP represents a remarkable feat of digital infrastructure development. The National Informatics Centre installed Data Centre Equipment at 776 out of 800 planned sites, creating a nationwide network that enables real-time disease surveillance. These data centers facilitate speedy data transmission from districts to state and central levels, ensuring that health officials can track disease patterns as they emerge.

The IT network operates on both terrestrial and satellite-based connectivity. The National Informatics Centre provided broadband connectivity to connect the vast majority of surveillance sites, while the Indian Space Research Organization installed training centers at 367 locations using satellite technology, particularly in northeastern states, hilly regions, and island territories where broadband connectivity was challenging to establish.

The IDSP portal serves as a one-stop destination with facilities for data entry, viewing reports, outbreak reporting, data analysis, training modules and resources related to disease surveillance. This centralized platform revolutionized how disease data is managed in India. Health workers at the grassroots level collect information on three specified reporting formats: S for syndromic or suspected cases, P for probable cases, and L for laboratory-confirmed cases. This standardized data collection ensures consistency and reliability across the entire surveillance system.

The system’s effectiveness became particularly evident during disease outbreaks. Weekly data analysis helps identify disease trends and seasonal patterns, and whenever there is a rising trend of illnesses in any area, trained Rapid Response Teams investigate to diagnose and control the outbreak. On average, 30 to 35 outbreaks are reported to the Central Surveillance Unit weekly, with the numbers showing a steady increase over the years as reporting mechanisms improved and confidence in the system grew.

Training and communication infrastructure 🔗

Beyond data centers, IDSP established comprehensive training facilities across the country. Training center equipment was installed at 378 sites by NIC, enabling state-to-district communication through e-learning portals. These facilities support live virtual classrooms for training on surveillance activities, e-learning modules, interactive discussions, and programme monitoring. This investment in capacity building ensures that surveillance personnel across the country have access to continuous education and skill development.

Early warning through media monitoring 🔗

The Media Scanning and Verification Cell was established under IDSP in July 2008 to improve event-based surveillance and catch unusual health events reported in the media. This proactive approach recognizes that disease outbreaks often first appear in news reports before they reach official health channels. The cell regularly monitors both electronic and print media for reports of unusual health events, then shares these alerts with concerned states and districts for verification and response.

The impact of this media surveillance has been substantial. A total of 3,063 media alerts were reported from July 2008 to November 2014, with the majority related to diarrheal diseases, food poisoning, and vector-borne diseases. This system creates an additional layer of disease surveillance that complements traditional reporting channels, ensuring that no potential outbreak goes unnoticed.

The media scanning system proved particularly valuable during large-scale health emergencies when traditional surveillance systems were stretched thin. By monitoring news sources in multiple languages and across different platforms, the verification cell could identify emerging health threats and ensure appropriate investigation and response at the local level.

The 1075 helpline: connecting citizens to disease surveillance 🔗

Perhaps one of IDSP’s most visible achievements for the general public has been the establishment of a toll-free disease alert helpline. A 24×7 call center was established in February 2008 with a toll-free number 1075 to receive disease alerts. The call center features multiple language calling and answering capabilities, allowing people speaking major regional languages to report information about outbreaks or unusual health events.

When someone calls the helpline, the information is relayed to appropriate District or State Level Surveillance Units and to the Central Outbreak Monitoring Cell at IDSP, which monitors the action taken by concerned districts. This citizen-powered surveillance system empowers communities to actively participate in disease monitoring and creates an additional channel for early outbreak detection.

Critical role during the H1N1 pandemic 🔗

The true value of the 1075 helpline became evident during the 2009 H1N1 influenza pandemic. The call center was extensively used during the 2009 H1N1 influenza pandemic and dengue outbreak in Delhi in 2010, receiving about 2.7 lakh calls from beginning till December 2013, out of which more than 35,000 calls were related to Influenza A H1N1. The helpline provided crucial information to both medical personnel and the general public about H1N1, including the location of nearest diagnostic centers.

During this critical period, IDSP’s influenza laboratory network, consisting of 12 strengthened labs, played a crucial role in the containment of the H1N1 pandemic through laboratory diagnosis and contact tracing. These laboratories tested thousands of samples and conducted operational research, including monitoring for antiviral resistance. The integration of the call center with laboratory capacity and surveillance infrastructure demonstrated how different components of IDSP work together during health emergencies.

Outbreak reporting and response achievements 🔗

The surveillance infrastructure has led to remarkable improvements in outbreak detection and reporting. The number of reported outbreaks has increased significantly over the years, not because outbreaks are more frequent, but because the system has become more effective at detecting and reporting them. From 553 outbreaks reported in 2008, the numbers grew to 799 in 2009, 990 in 2010, 1,675 in 2011, and continued to rise in subsequent years. This represents a paradigm shift from the traditional reluctance to report outbreaks to a culture that encourages reporting and timely response.

The weekly outbreak reports generated by the Central Surveillance Unit are shared with all key stakeholders, including the Prime Minister’s Office, ensuring that disease surveillance information reaches the highest levels of government for informed decision-making. The majority of reported outbreaks involve acute diarrheal diseases, food poisoning, measles, and vector-borne diseases, providing valuable data for public health planning and intervention strategies.

What do you think? How might mobile technology and artificial intelligence further enhance disease surveillance systems like IDSP? What role should citizens play in reporting unusual health events in their communities?

References

1. https://ncdc.mohfw.gov.in/integrated-disease-surveillance-programme/
2. https://idsp.nic.in/index1.php?lang=1&level=1&sublinkid=5769&lid=3701
3. https://idsp.mohfw.gov.in/index4.php?lang=1&level=0&linkid=408&lid=3691
4. https://en.wikipedia.org/wiki/Integrated_Disease_Surveillance_Programme
5. https://idsp.nic.in/index1.php?lang=1&level=1&sublinkid=5768&lid=3697
6. https://bmcpublichealth.biomedcentral.com/articles/10.1186/1471-2458-10-S1-S11
7. https://idsp.mohfw.gov.in/index1.php?lang=1&level=1&sublinkid=5789&lid=3722