The first few months were spent debating whether masks work or not. Evidence was mixed. Studies since have found it to be effective for Coronavirus. The World Health Organisation only last month changed its guidance to say everyone should be wearing masks rather than their original stance of everyone infected should wear a mask. A part of the shift to masks is because you can have it and spread it and not know.
Despite mass protests, big beach crowds and Liverpool title celebrations there was no spike in cases. You can say that's luck and chance falling kindly or that the virus doesn't spread well outdoors, or both.
What we do know is the virus is spreading in enclosed places of poor hygiene and conditions. Slaughterhouses, factories, farm housing.
Generally the population, myself included, are becoming less and less risk averse as time goes on.