In the review, unnamed authors determined there's a lack of evidence supporting certain medical interventions, breaking with most medical groups.

The potential change outlined in a statement would require all new vaccines to undergo placebo testing, sparking concerns among medical experts.

In a shift away from next-generation Covid-19 vaccines, the Trump administration is investing $500 million in a vaccine project championed by two scientists who were recently tapped to serve in senior roles within the National Institutes of Health,