Lockdowns from China to Europe as trials stumble

As Europe imposed new restrictions to try to stall a surging second wave of the novel coronavirus, hopes for vaccines to rapidly provide relief suffered a blow Tuesday with the suspension of two clinical trials in the United States. China, meanwhile, rushed to test an entire city of nine million within days after a minor coronavirus outbreak in the sprawling country, and Europe struggled to tackle a new surge of infections. The virus is still spreading rapidly worldwide, with more than one million deaths and 37 million infections. Many nations that suppressed their first outbreaks now face a second wave.