The number of coronavirus infections around the world hit 13 million on Monday, according to a Reuters tally, climbing by a million in just five days.
The pandemic has now killed more than half a million people in six-and-a-half months, and World Health Organization (WHO) chief Tedros Adhanom Ghebreyesus said there would be no return to the "old normal" for the foreseeable future.
"If governments do not clearly communicate with their citizens and roll out a comprehensive strategy focused on suppressing transmission and saving lives, if populations do not follow the basic public health principles of physical distancing, hand-washing, wearing masks, coughing etiquette and staying at home when sick - if the basics aren't followed, there is only one way this pandemic is going to go. It's going to get worse and worse and worse."
Parts of the world, especially the United States, are still seeing huge increases in a first wave of COVID-19 infections, while others "flatten the curve" and ease lockdowns.
Some places, including the Australian city of Melbourne and Leicester in England, are implementing a second round of shutdowns.