Why Does A Virus Cause Problems In One Region But Not Another? A Study Offers Insight
In 2015, the mosquito-borne virus Zika exploded in South America. Health experts predicted it would erupt in Africa. But a major outbreak never happened. Now scientists think they understand why.
Why does a disease hit some countries or regions hard and largely spares others?
For example, with COVID-19, the virus has surged so strongly in North and South America. But it has been less of a problem in Africa and many parts of Asia.
No one knows the answer yet for COVID-19. But for another emerging disease, called Zika, scientists now have a better understanding of why the virus hasn't been a major problem in Africa, despite originating on the continent. It likely boils
