WHO declared the outbreak a global health emergency in July.

The number of cases reported globally declined 21% in the week ended Aug 21, after a month-long trend of rising infections, according to WHO’s latest epidemiological report.

“There are signs the outbreak is slowing in Europe, where a combination of effective public health measures, behaviour change and vaccination is helping to prevent transmission,” WHO director-general Tedros Adhanom Ghebreyesus said in a press briefing.

Still, more than a dozen countries saw a rise in weekly case numbers with the highest increase reported in the US.

Over 34% of the current global case count is in the US.

WHO said infections in the Americas region showed “a continuing steep rise” in the previous week.