FILE PHOTO: Executive Director of the World Health Organization's (WHO) emergencies program Mike Ryan speaks at a news conference on the novel coronavirus (2019-nCoV) in Geneva, Switzerland February 6, 2020. REUTERS/Denis Balibouse

GENEVA: The World Health Organization's top emergencies expert cautioned on Wednesday (May 13) the world had a "long, long way to go" to bring the coronavirus pandemic under control, despite tentative steps in many countries to begin restarting normal life.