- The CoWIN data leak refers to the unauthorized access and sharing of sensitive patient data and vaccination records of Indian citizens, which were stored on the CoWIN platform. - The leak reportedly involved the personal data of around 150 million people, including their names, addresses, and vaccination status. - The leak raises concerns about data privacy and security, as well as the potential for misuse of such information. - The Indian Computer Emergency Response Team (CERT-in) has responded to the leak by launching an investigation and working with relevant authorities to identify the source of the leak and prevent further incidents in the future. - CERT-in has also issued guidelines and advisories to CoWIN and other agencies on how to strengthen their cybersecurity measures and mitigate the risk of data breaches. - The CoWIN data leak highlights the need for stronger data protection laws and measures in India, as well as greater awareness and education on cybersecurity among the general public and government agencies alike.