Dr Mike Ryan, executive director of the World Health Organization’s Health Emergencies Programme, speaking during a news conference in Geneva on Monday, said in order to completely stop the virus it is important to identify where the human-animal barrier was breached.
“This virus is proving exceptionally difficult to stop,” Ryan said, saying that it was important to reflect on what is known about the virus, in terms of the ease of spread, the multiple transmission modes and the existence of asymptomatic and presymptomatic transmission.
“This is not an easy virus and not an easy virus, either, to detect. It’s not an easy virus to stop,” he said.
Ryan explained that an epidemiologic investigation will start in Wuhan, China because that’s where the first clusters of cases were picked up, but that doesn’t necessarily mean that is where Case Zero (the very first case) was.
According to Dr Ryan, finding ‘Case Zero’ helps to distinguish this crossing of the barrier between species.
“If you follow the data and the science, you will find, hopefully, the point at which the disease crossed the species barrier,” he said.
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