“We disrupt eco-systems, and we shake viruses loose from their natural hosts. When that happens, they need a new host. Often, we are it.” So argues David Quammen in We Made the Coronavirus Epidemic, New York Times, 28 January. There have been a number of similar articles pointing out the link between human destruction of biodiversity and the prevalence of viruses that cross the barrier between wild animals and humans. I have found it useful to summarise them and so am sharing here in case it is helpful for others also.