Question: How do I know if a respirator is counterfeit?

Answer passage (source: CDC):
page_title: Personal Protective Equipment: Questions and Answers
section_headers: Respirators
How do I know if my respirator is expired?
section_content: NIOSH does not require approved N95 filtering facepiece respirators (FFRs) be
marked with an expiration date. If an FFR does not have an assigned expiration
date, you should refer to the user instructions or seek guidance from the
specific manufacturer on whether time and storage conditions (such as
temperature or humidity) are expected to have an effect on the respirator’s
performance and if the respirators are nearing the end of their shelf life.

Reviewer feedback on this answer:
This answer does not talk about how to detect authentic or counterfeit masks, but rather talks about the expiration dates and shelf life. Therefore, this answer is bad and does not effectively answer the question.
This information does not answer the question. This information is about the expiration date on respirators and the question is asking about how to identify a counterfeit respirator.

Reviewer ratings:
Bad
Bad

Answer passage (source: CDC):
page_title: Personal Protective Equipment: Questions and Answers
section_headers: Respirators
How can I tell if a respirator is NIOSH-approved?
section_content: The NIOSH approval number and approval
label
are key to identifying NIOSH-approved respirators. The NIOSH approval label
can be found on or within the packaging of the respirator or sometimes on the
respirator itself. The required labeling of NIOSH-Approved N95 filtering
facepiece respiratorspdf
icon includes the NIOSH name, the approval number, filter
designations, lot number, and model number to be printed on the respirator.
You can verify that your respirator approvals are valid by checking the NIOSH
Certified Equipment List
(CEL).

Reviewer feedback on this answer:
This answer is excellent because it provides in detail how to detect an authentic face mask. The answer includes links and detailed explanations as to what to look for on a mask.
This answers the question directly. The answer provides information of how to identify counterfeit respirator by finding the NIOSH approval number and label on the respirator packaging or on the respirator itself.

Reviewer ratings:
Excellent
Excellent

Answer passage (source: CDC):
page_title: Personal Protective Equipment: Questions and Answers
section_headers: Respirators
How do I know if a respirator is falsely advertising NIOSH-approval?
section_content: When NIOSH becomes aware of counterfeit respirators or those misrepresenting
NIOSH approval on the market, these respirators are posted on the Counterfeit
Respirators / Misrepresentation of NIOSH-
Approval
webpage to alert users, purchasers, and manufacturers.

Reviewer feedback on this answer:
The answer addresses the questions, and provides a link to more information about counterfeit face masks. Due to being dependent on the link, the answer is not excellent, but it is acceptable since it does address the question.
This information does not answer the question. The question is asking about how to identify counterfeit respirators, however, the answer is providing information of actions taken by NIOSH when they find out about counterfeit respirators.

Reviewer ratings:
Acceptable
Bad