How we perceive personal risk, and how well we comply with public health measures, can change depending on whether we are around people we know or strangers.
Just because someone isn't wearing a mask doesn't mean they don't want to. They might have a disability or medical condition you can't see that makes wearing a mask difficult or distressing.
A survey of 1420 Australians conducted at the height of the pandemic shows the majority changed their behaviour to be socially responsible, even when the threat seemed low.
The most effective way to improve flu vaccination rates among health workers in high-risk clinical areas and aged care facilities is to make it mandatory.