Except what you claimed above is not what the article actually says.
This is what it says:
"A story published by One America News Network, a conservative cable channel, on March 7,
falsely claimed the CDC “has admitted face masks do little to prevent the spread” of the virus and that the numbers in the study “didn’t exceed statistical margins of error.” The story has been seen by over 230,000 users on Facebook.
A CDC spokesperson told us that’s not correct.
“The data we now have conclusively show that widespread use of masks is a very effective way to reduce the spread of COVID-19,” said CDC’s Jasmine Reed in an email. “The CDC study referenced noted that mask mandates were associated with statistically significant decreases in county-level daily COVID-19 case and death growth rates.”'
"The new study cites and builds upon
previous studies that have confirmed the effectiveness of mask mandates and restaurant closures in reducing COVID-19 outcomes."
There are additional findings on that same page that further support what basically every reputable news source is saying.
It says nothing about negative long-term health effects from mask wearing. In fact, since it is more likely to prevent the spread of covid, it is theoretically more likely to keep the mask wearer alive since they are more likely to not get covid.
But as the fact checking you provided specifically cites One America News Network and Fox News as spreading incorrect information about the effectiveness of mask wearing, thank you for unintentionally proving my point above that the information delivered has often been slanted along partisan lines!