[devenson]

mRNA could be said to be in the trough of disillusionment -- didn't prevent COVID as initially promised, and has problems like causing heart damage in rare cases.

This disillusionment is evidenced by lower proportion of people seeking to take such injections now.

[AIPedant]

The trough of disillusionment really refers to serious analysis of a technology's problems, not idiotic conspiracy theories spread on Twitter. This is like saying 5G entered the trough of disillusionment because of the threat of telepathic Zionists.

In Realityland, the COVID vaccine was an overwhelming success.