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Yes, the situation changed, but at least in the US the vaccine push from health and political authorities stayed on the taking point regarding the vaccine would stop you from catching and spreading the disease continued for at least three weeks until the talking point changed to “less severe disease”…which at the time was more speculation than a scientific proven result (It’s even a dubious claim today).

So, at points, there were definite lies (including a few well known ones, not related to vaccines), the lies were exposed, and the end result was distrust.