Professor Philip Nolan:

I will answer and I am sure Dr. De Gascun will also have views. This is not simply a question of being right or wrong. As Dr. De Gascun has pointed out, this is a novel virus. There is a lot we do not know about the virus. There is a lot we do not know about the effectiveness of different public health interventions. So, in any such context one is going to have different scientists who will have different judgments based on the incomplete evidence available to them. That is the first thing I would say. It is not unusual for scientific knowledge to be contested. The people involved in that, I know many of them-----