What signal? Most people were locked up in their homes when COVD came a knocking...or otherwise out of work and on government welfare. I doubt they needed further examples of government intervention to tell them there was a pandemic.
I think this represents a significantly higher proportion of the population than we previously thought during normal times, so maybe they did need a reminder that it was a slightly different than usual “no work day”
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That’s why they had contact tracers and apps
I think that may have worked when we had single digit daily “cases”. That’s well and truly in the past. I don’t know a single person who, in 2022, has a definitive answer as to where they “caught it” (large inline with most colds).