In the digital era, cybersecurity in health information systems plays a vital role in protecting patient data and ensuring the continuity of healthcare services. However, the increasing occurrence of cyber-attacks threatens the integrity and confidentiality of sensitive medical records, potentially causing financial losses, disruptions in healthcare delivery, and breaches of patient privacy.
 This letter examines real-world cyber-attacks on health systems, such as ransomware targeting hospitals, phishing incidents compromising patient databases, and unauthorized access leading to massive data leaks. To prevent such threats, multi-layered security models are proposed, including advanced firewalls, encryption, AI-based monitoring, and regular security assessments. Additionally, staff training, backup strategies, and penetration testing are essential to maintaining system resilience. 
Despite these proactive measures, implementation challenges—such as high costs, lack of cybersecurity expertise, and resistance to technological advancements—must be addressed. By investing in technology, training, and awareness, healthcare institutions can enhance security, prevent cyber-attacks, and strengthen public trust in medical systems.