More than 14.73 million people have been reported to be infected by the novel coronavirus globally and 609,142 have died, according to a Reuters tally.
Infections have been reported in more than 210 countries and territories since the first cases were identified in China in December 2019.
In the meantime, early data from trials of three potential novel coronavirus vaccines released on Monday, including a closely watched candidate from Oxford University, increased confidence that a vaccine can train the immune system to recognise and fight the virus without serious side effects.
All must still prove they are safe and effective in trials involving thousands of subjects.
Still, much remains unknown about vaccines in development, particularly the staying power of any immune responses and effectiveness in older people or other specific groups, including people with chronic health problems and ethnic groups more severely affected by the disease.