Reflecting on 2 years of Covid-19 pandemic: 3 things we got wrong, and 3 things to look out for

• It’s been two years since the WHO first declared Covid-19 as a pandemic which has so far infected more than 450 million people
• In early 2020, we didn’t know whether a vaccine was possible and we changed our minds on masks. As Covid becomes endemic, we need to watch out for new strains and waning immunity