E-learning - from first experiences in medical physics and engineering to its role in times of crisis.

The paper reviews briefly notable examples of e-learning, specifically the pioneering projects in medical physics and engineering. The needs for implementation of e-learning and the challenges to be resolved are underlined with a view of potential quick application of e-learning. The role of e-learning during times of crisis, such as the current COVID-19 pandemic is discussed and the need of adequate pre-preparedness is highlighted. Examples are shown from the recent book "e-Learning in Medical Physics and Engineering: Building Educational Modules with Moodle". Ways of reaching the target audience and the problems in some Lower-and-Middle Income countries are presented, together with some examples of quick adoption of e-Learning. The way forward has been argued, emphasizing that realistically the place of e-Learning is to complement traditional teaching and learning activities, enhancing their value and quality.