GENEVA — After five weeks of declining coronavirus deaths, the number of fatalities reported globally increased by 4 percent last week, according to the World Health Organization.

In its weekly assessment of the pandemic issued on Thursday, the U.N. health agency said there were 8,700 COVID-19 deaths last week, with a 21 percent jump in the Americas and a 17 percent increase in the Western Pacific.

WHO said coronavirus cases continued to fall, with about 3.2 million new cases reported last week, extending a decline in COVID-19 infections since the peak in January. Still, there were significant spikes of infection in some regions, with the Middle East and Southeast Asia reporting increases of 58 percent and 33 percent respectively.

“Because many countries have reduced surveillance and testing, we know this number is under-reported,” WHO Director-General Tedros Adhanom Ghebreyesus said earlier this week. He said there was “no acceptable level of deaths from COVID-19,” given that the global community now has the vaccines, medicines and diagnostics to stop the virus.

While many rich countries in Europe and North America have mostly dropped their virus restrictions, China’s extreme COVID-19 policies have meant more mass testing, quarantines and sequestering of anyone who was in contact with a case.

China’s capital put school back online this week in one of its major districts amid a new COVID-19 outbreak linked to a nightclub. Residents in Beijing are still undergoing regular testing — mostly every other day — and must wear masks and swipe a mobile phone app to enter public places and facilitate case tracing.

China has maintained its “zero-COVID” policy despite considerable economic costs and an assertion from the head of the World Health Organization that the policy isn’t sustainable.

This week, U.S. officials moved a step closer to authorizing coronavirus vaccines for the youngest children, after the Food and Drug Administration’s vaccine advisers gave a thumbs-up to vaccines from Moderna and Pfizer-BioNTech for children under 5.

The outside experts voted unanimously that the benefits of the shots outweigh any risks for children under 5 — that’s roughly 18 million youngsters. They are the last age group in the U.S. without access to COVID-19 vaccines, and many parents have been anxious to protect their little children.

If all the regulatory steps are cleared, shots should be available next week.