I can only speak with certainty about myself and those I know - but my partner and I started changing our behaviour quite dramatically in early March, and I was advising those I know - club members, B+B owners, yoga attendees - to do the same; there will have been plenty of others doing this I'm sure. Of course there were those who refused to change their ways except where they had to, but they will have still been reducing their risk, even if they tried not to do so.
The situation in the US shows what can happen if you let it.