Dr. Maria Wanker-Kove

People who have shared cabins, etc. So again, our assumption is that has happened. And that's why we are operating and working with the ship to make sure that anyone who is symptomatic, anyone caring for patients is wearing full personal protective equipment. The medical personnel who have boarded the boat have brought additional PPE as well. So how unusual is it for the virus to spread between humans rather than from rodents to humans? Our health correspondent is Jim Reid.