It is not the MEDIA saying stuff, they don't make stuff up. They quote authorities from the CDC and the FDA. Spokespersons from those agencies go on the news outlets and are interviewed by the media, who ask pertinent questions and get answers FROM these authorities.
Saying the media "says" this or that is like, if you read a quote from Dr So-and-so in a book, then you turn around and say, "I can't trust what I read in that book, it's only ink and paper, and you know it could be full of lies because I read a book about a girl named Cinderella once and it turned out it wasn't true. Books lie."
The "media" is journalists reporting the news, REPORTING what is happening. Yeah, there have been people who did not like it when journalists pulled back the curtain on their nefarious dealings, and tried to cover their deeds by crying, "it wasn't me," or "it didn't happen," in spite of all evidence to the contrary, or yell, "Lies, lies, fake news," or, as in the Wizard of Oz, "Don't look behind the curtain," but honest journalists report the TRUTH, no matter who doesn't like it.
It is not the media saying the vaccine loses potency. The media is reporting that DOCTORS and the CDC and the companies that MADE the vaccine and those who are studying the efficacy of the vaccine are saying it is losing its potency. Don't shoot the messenger!