THE global death toll from COVID-19 could double to 2 million before a successful vaccine is widely used and could be even higher without concerted action to curb the pandemic, according to an official at the World Health Organization. "Unless we do it all, (2 million deaths) ... is not only imaginable, but sadly very likely," Mike Ryan, head of the U.N. agency's emergencies programme, told a briefing. The number of deaths about nine months since the novel coronavirus was discovered in China is nearing one million "We are not out of the woods anywhere, we are not out of…