New York, July 11 -- COVID-19 cases globally have more than doubled in the past six weeks, reaching 12 million on Friday, the World Health Organization (WHO) has reported.

"Across all walks of life, we are all being tested to the limit", agency chief Tedros Adhanom Ghebreyesus told journalists, adding that there is still a lot of work to be done.

"From countries where there is exponential growth, to places that are loosening restrictions and now starting to see cases rise. We need leadership, community participation and collective solidarity. Only aggressive action combined with national unity and global solidarity can turn this pandemic around", he said.

Tedros cited examples from across the globe which show that even where the outbreak...