But won’t people get tired of following these policies, especially if we have a second wave coming? There is a lot of debate in policy circles around whether “fatigue” may set in or whether one policy may interfere with the effectiveness of others. For example, could masks prompt people to pay less attention to other preventative measures? In behavioural science, this is called ‘risk compensation’, and we can conduct systematic research to address these questions. A recent review paper found that wearing a mask did not make people wash or sanitise their hands less often. It also cited observational studies with findings that people moved away from people who wore masks, increasing physical distance and lowering the chance of infection. Just as we’ve been guided by virologists and epidemiologists on how COVID spreads, policy-makers can use research on effective behaviour change techniques to motivate adoption of protective behaviours through an evidence-based combination of measures, such as education, persuasion, incentivisation and remodelling of the environment.