GENEVA, Switzerland (AFP) — Malaria mortality has fallen back to levels seen before the Covid-19 crisis, the World Health Organization (WHO) said Wednesday, but called for faster progress against the disease that killed nearly some 597,000 people last year.

In a new report, the WHO estimated that there were 263 million cases of malaria worldwide in 2023 — 11 million more than a year earlier — while the death toll remained relatively stable.

But in terms of the mortality rate, “we have come back to pre-pandemic numbers,” Arnaud Le Menach, of the WHO’s Global Malaria Program, told reporters.

In 2020, disruptions caused by the Covid-19 pandemic led to a sharp increase in malaria-related mortality, with an additional 55,000 deaths counted that year.

Since then the total number of deaths from malaria, which is caused by a mosquito-borne parasite, has gradually shrunk, as has the mortality rate.

The estimated 2023 mortality rate in Africa of 52.4 deaths per 100,000 population at risk meanwhile still remains more than double the target level set by a global strategy for combatting malaria through 2030, WHO said, insisting “progress must be accelerated.”

WHO pointed to the wider rollout of malaria vaccines as a promising development, expected to save tens of thousands of young lives each year.

The two jabs currently in use, RTS,S and R21/Matrix-M, hold the promise of significantly easing the burden in Africa, which accounts for up to 95 percent of all malaria deaths.

Malaria vaccines were first introduced in April 2019, first in Malawi, with Kenya and Ghana following suit.

Through the end of 2023, nearly two million children in those three countries received jabs of the RTS,S vaccine, WHO said.

“We saw in those three pilot countries... a 13-percent drop in mortality during the four years of the pilot program,” said Mary Hamel, who heads WHO’s malaria vaccine team.

The WHO now looked forward to seeing a similar drop in other countries introducing the vaccines, she told reporters, pointing out that countries that began introducing the jabs early this year were “following a similar trajectory.”

So far, 17 nations across sub-Saharan Africa have included the jabs in their routine immunization programmes, she said

Another eight countries had been approved to receive funding towards introducing the vaccines through the vaccine alliance GAVI, WHO said.