<div class="responsive-youtube"> <iframe width="580" height="385" src="https://www.youtube.com/embed/wImdjF1OoeM?rel=0&modestbranding=1" frameborder="0" allowfullscreen></iframe> </div> <br>4.3.1.2 Viral Diseases revision video for AQA Combined Science: Trilogy, AQA Biology GCSE. <br><a href="https://www.youtube.com/watch?v=wImdjF1OoeM">source</a>