Below is a table summarizing the percent risk reduction of COVID-19 prevention interventions compiled by Sophy S. Wong, MD. Click here for a more detailed document with studies on the data and science behind COVID-19 harm reduction strategies.
There are many ways we can reduce the risk of COVID-19. Some of these methods, such as wearing face masks, practicing hand hygiene and distancing, staying outdoors and opening windows and doors when indoors are effective and low- or no-cost.
We can use some or all of them in combination. We aim to have as many of these strategies as accessible as possible and do the best we can with what we have. The more strategies we use together, the better we can prevent the spread of COVID-19 and save lives.