The Bill & Melinda Gates Foundation on Wednesday said it would spend an additional $150 million on coronavirus response efforts, raising its total commitment to $250 million.

The new funds will go toward developing testing, treatment, and vaccines for COVID-19 as well as strengthening healthcare systems in Africa and South Asia, the charity said.

The announcement comes just a day after Bill Gates slammed President Donald Trump's decision to cut US funding for the World Health Organization.

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The Bill & Melinda Gates Foundation announced in a press release Wednesday that it would pitch in an additional $150 million to the global response to the coronavirus pandemic, bringing its total commitment to $250 million.

The charity said the new funds would be put toward developing testing, treatments, and vaccines for COVID-19 as well as helping its partners in Africa and South Asia expand their "detection, treatment, and isolation efforts."

"It is increasingly clear that the world's response to this pandemic will not be effective unless it is also equitable," the charity's cochair Melinda Gates said, adding that the funds "will support efforts against COVID-19 in low- and middle-income countries, where local leaders and healthcare workers are doing heroic work to protect vulnerable communities."

The announcement came just a day after Bill Gates criticized President Donald Trump's decision to withdraw US financial support for the World Health Organization. On Tuesday evening, Trump said he would stop the $400 million to $500 million of US funding for the body, pending an investigation into what he saw as its aiding China in "covering up" the novel coronavirus.

Following Trump's announcement, Bill Gates tweeted: "Halting funding for the World Health Organization during a world health crisis is as dangerous as it sounds."

"COVID-19 doesn't obey border laws," he said in Wednesday's press release. "The world community must understand that so long as COVID-19 is somewhere, we need to act as if it were everywhere. Beating this pandemic will require an unprecedented level of international funding and cooperation."

The Gateses aren't the only tech billionaires who have pledged significant amounts of money to help fight the coronavirus. Twitter CEO Jack Dorsey has announced plans to donate $1 billion toward a relief fund, an amount he says is roughly 28% of his net worth. Amazon CEO Jeff Bezos and Facebook CEO Mark Zuckerberg have committed $100 million and $25 million, respectively, though the amounts are fractions of their net worth.