Key points from article :
WHO concerned at cases with no clear link to China or other confirmed cases.
World Health Organization says window of opportunity to contain the virus is narrowing.
China reported a decrease in deaths and new cases of the coronavirus on Saturday.
More than 1,200 cases of the virus confirmed in 26 countries outside of China, including 8 deaths.
The new virus causes a respiratory disease called Covid-19.
Iran has reported four deaths from 18 cases confirmed in the country.
Fighting chance of stopping further spread if countries put more resources into preparing for outbreaks.