ليه بنتعب وبننسى المعلومات ومبنعرفش نركز ايام الامتحانات User Water My Mind - اروي عقلي on YouTube, 13 Jan 2024 Effect of stress and cortisol on immune system https://health.clevelandclinic.org/what-happens-when-your-immune-system-gets-str…