LONDON: As World Malaria Day approaches on April 25, a global health chief has said that extreme weather events in Pakistan have been behind "very sharp" rises in malaria infections and deaths.
After last year's devastating floods left a third of Pakistan under water, cases rose four-fold to 1.6 million, according to the World Health Organisation (WHO).
In Malawi, Cyclone Freddy in March triggered six months' worth of rainfall in six days, causing cases there to spike too, Peter Sands, head of the Global Fund to fight AIDS, Tuberculosis and Malaria, told AFP in an interview.
"What we've seen in places like Pakistan and Malawi is real evidence of the impact that climate change is having on malaria," he said.
"So you have these extreme weather events, whether flooding in Pakistan, or the cyclone in Malawi, leaving lots of stagnant water around the place.
"And we saw a very sharp uptick in infections and deaths from malaria in both places," he said ahead of World Malaria Day on April 25.
Sands said World Malaria Day was usually an opportunity to "celebrate the progress we have made".
But this year it was an occasion to "sound the alarm".
The dramatic increase in cases caused by climate-change-driven weather disasters illustrated the need to "get ahead of this" now, he said.
"If malaria is going to be made worse by climate change, we need to act now to push it back and where we can eliminate it," he said.
In both countries, pools of water left behind as waters receded created ideal breeding grounds for malaria-carrying mosquitoes.
Sands said there had been some progress made in the fight against malaria but stressed that a child still dies of the disease every minute.
In 2021, the WHO said there were an estimated 247 million cases worldwide and 619,000 deaths attributed to malaria.
Scientific breakthroughs saw more than a million children in Ghana, Kenya and Malawi last year given the RTSS vaccine manufactured by British pharmaceutical giant GSK.
Another vaccine, R21/Matrix-M, developed by Britain's Oxford University, received clearance to be used in Ghana earlier this month — the first time it has received regulatory clearance anywhere in the world.
But Sands, the fund's executive director, cautioned that the vaccines should not be seen as a "silver bullet".
Vaccines had less potential to combat the disease than routine diagnosis and treatment infrastructure due to the relative cost of immunisation and the difficulty of large-scale deployment.
The groups most vulnerable to malaria are children under the age of five and pregnant women, with deaths largely down to late diagnosis and treatment.
"It's all about having services that can diagnose and provide treatment... that means you need community health workers in every village, who actually have the tools to test and to treat," he said.
"And we need to ensure that these country's health systems are made more resilient to these kinds of shocks (because) what we tend to see is a lot of destruction of valuable medical commodities, drugs, treatments."
Sands said the countries at greatest risk from climate change were also those with the "highest burden of malaria".
"There's an almost perfect overlap so we are very concerned that the countries in which malaria is more prevalent... are also the countries that are most likely to get hit by the extreme weather events that climate change generates," he added.
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