How are Covid-19 vaccine booster shots being covered on television news? The timeline below shows total mentions of booster shots across CNN, MSNBC and Fox News since the start of the pandemic, showing few mentions until early 2021. Coverage of booster shots accelerated sharply since July 9, 2021, when Pfizer announced it was seeking authorization for a booster shot and has steadily increased on CNN and MSNBC, but not on Fox News.