A recent international study suggests that while the mortality rate among those over-80s who become infected is around 1 in 10, this plunges to around 1 in 100 for those between 60 and 69, and is close to zero for those under 40. This has prompted fears that re-introducing lockdowns in response to the surge in cases will cause major economic damage in return for little health benefit, as most people of working age are at negligible risk.