KN95 are better than the regular surgical masks we’ve been using so far.
They are not for use in an ICU or EMT situations where breathing in the virus is an issue.
The current “authenticity” issue based on code-imprinted (or lacking) KN95 masks is not a panic issue.
I suspended a mask (the red package with 105 on the package) and poured water into it. It took a good 30 minutes to start leaking the water in a drip manner.
That, and the price, sealed the doubts.
CDC is not involved here as these are not NIOSH masks!