Many people believe the CDC was concerned that there wouldn't be enough PPE for healthcare workers, and so de-emphasized mask use for the general population.
But if they hope to maintain one shred of credibility, then they shouldn't "de-emphasize" by lying about mask effectiveness.
Once they try the excuse "Yes, we lied to you, but it was for a good reason", who in their right mind would ever believe a word they say again?
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