India's National Health Stack (NHS) is a comprehensive digital infrastructure aimed at improving healthcare delivery across the country. Some key features of NHS are:

• Interoperability: The NHS will ensure that all health data is stored in a standardized format, making it easier for different health systems to communicate with each other.
• Modularity: The NHS will consist of multiple building blocks, each of which focuses on a specific aspect of healthcare delivery.
• Open architecture: The NHS will use open APIs, allowing healthcare providers to build custom applications on top of the stack.
• Security: The NHS will ensure that all health data is stored in a secure manner, protecting patient privacy.
• Data analytics: Through the NHS, healthcare providers will have access to a wealth of data, allowing them to analyze healthcare trends and make informed decisions.

By providing a standardized, modular, and secure digital infrastructure, the NHS aims to enable a more efficient and effective healthcare system in India. It will also help to reduce costs and improve patient outcomes, ultimately leading to a healthier and more prosperous society.