By , STOCKHOLM (Reuters) - A Swedish study found that just 7.3 percent of Stockholmers developed COVID-19 antibodies by late April, which could fuel concern that a decision not to lock down Sweden against the pandemic may bring little herd immunity in the near future.The strategy was championed by Chief Epidemiologist Anders Tegnell, whose recommendation for voluntary measures against the virus, rather than a mandatory lockdown like those imposed by many other countries, has divided opinion at home and abroad.Sweden’s strategy of keeping most schools, restaurants, bars and businesses open...…By , STOCKHOLM (Reuters) - A Swedish study found that just 7.3 percent of Stockholmers developed COVID-19 antibodies by late April, which could fuel concern that a decision not to lock down Sweden against the pandemic may bring little herd immunity in the near future.The strategy was championed by Chief Epidemiologist Anders Tegnell, whose recommendation for voluntary measures against the virus, rather than a mandatory lockdown like those imposed by many other countries, has divided opinion at home and abroad.Sweden’s strategy of keeping most schools, restaurants, bars and businesses open...WW…