Even in parts of the world that had appeared to have curbed the spread of the virus, countries have recently seen single-day records in new cases, signaling the battle is far from over. Australia, Japan, Hong Kong, Bolivia, Sudan, Ethiopia, Bulgaria, Belgium, Uzbekistan and Israel all recently had record increases in cases.

An analysis by the WHO of 6 million infections between Feb. 24 and July 12 found that the share of people aged 15-24 years rose to 15% from 4.5%.

Apart from the United States which leads a global tally with 4.8 million total cases, European countries including Spain, Germany and France, and Asian countries such as Japan, have said that many of the newly infected are young people.

“Younger people tend to be less vigilant about masking and social distancing,” Neysa Ernst, nurse manager at Johns Hopkins Hospital’s biocontainment unit in Baltimore, Maryland told Reuters in an email.