In the ongoing battle against seasonal flu and infectious diseases, wearable sensors have emerged as innovative tools that offer valuable insights into individual health and public health monitoring. These wearable devices, equipped with advanced sensing technologies, provide continuous real-time monitoring of various physiological parameters associated with flu-like symptoms. By tracking vital signs, such as body temperature, heart rate, respiratory rate, and oxygen saturation, wearable flu sensors offer early detection, prompt intervention, and proactive management of flu cases even in daily lives. In this article, we will review the mechanical sensors, specifically about the key features, working principles, and potential applications of wearable mechanical sensors, highlighting their significant role in revolutionizing personal health monitoring and contributing to global efforts in flu prevention and control.