(CNN) — President Donald Trump on Monday appeared to raise fresh questions about the Covid-19 vaccines that were first developed on his watch, saying his top public health agency is being “ripped apart” by debate over the success of the shots.

While noting that he’s seen “great numbers and results” from some drug companies, Trump demanded they prove publicly that vaccines are effective in combating Covid and questioned whether unspecified data was being withheld from the public.

“I want them to show them NOW, to CDC and the public, and clear up this MESS, one way or the other!!!” Trump wrote on Truth Social . “I hope OPERATION WARP SPEED was as ‘BRILLIANT’ as many say it was. If not, we all want to know about it, and why???”

The post represented Trump’s first public comments about

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