YouTube and Facebook are on the list of social media platforms that the White House thinks are responsible for an alarming spread of misinformation about COVID vaccines and are not doing enough to stop it, Reuters reported citing sources in the administration.

The criticism comes just a week after President Joe Biden called Facebook and other social media companies "killers" for failing to slow the spread of misinformation about vaccines. He has since softened his tone.

A senior administration official said one of the key problems is "inconsistent enforcement."

YouTube and Facebook get to decide what qualifies as misinformation on their platforms. But the results have left the White House unhappy.