While repeated waves of Covid-19 infections are prolonging the global pandemic, the literature is drawing tentative lessons from the various measures implemented. This column highlights five. (1) A stringent and early lockdown seems more efficient. (2) Although a comparison across measures is econometrically challenging, the cancelling of public events stands out as one of the most efficient. (3) While the merits of geographical targeting seem mixed, numerous models advocate for targeting by age and type of job. (4) Even without a lockdown, pandemics affect economic activity through voluntary social distancing. (5) Relaxing a lockdown should be done gradually even during vaccine roll-out, as avoiding a resurgence relies on rigorous sanitary measures.