"In a free society there wouldn't be anything like a WHO or CDC. There would be competing organizations with different views on the disease, different recommendations, and most importantly voluntary funding"
No. One of them would be contracted by the government to advise and provide services, coordinate vaccines, evaluate medical research. We could only HOPE that it was a merit choice, not an old boys' network choice or a pander-to-the-vocal-minority choice.
"The media also would never have become as political or corporatist as it is."
Wait, you want private ownership of World Health and Disease Control, but you want, what, government ownership of the media?
Free market or socialism, dude. Pick one.
"Hardly any business owner or laborer is going to voluntary fund an organization that demanded their business or place of employment be forcibly closed for arbitrary reasons."
Oh. Well, if you think that attempts to fight the pandemic are 'arbitrary,' then you're already lost. And that puts us back to the government contracting with the Health organization that's best for business, not the best for 'the general welfare' as listed in the Constitution.