Some of the worst diseases like Aids, tuberculosis and the plague originally came from animals. The new coronavirus is just the latest. For a successfull fight against the disieases, we need to know where they start. With us? Or with our friends in the animal kingdom? And how exactly do they move between hosts. Scientists are trying to work that out, but have to be careful not to make matters worse while in the field.
How dangerous is virus transmission from wild animals to humans | COVID-19 Special
