More than 4 million people have died from COVID-19, the World Health Organization said Wednesday. The grim milestone comes less than three months after the worldwide death toll hit 3 million in April, as countries race to vaccinate enough people to stop faster-spreading variants. WHO Director-General Tedros Adhanom Ghebreyesus criticized the vaccine response from richer countries, who prepurchased many shots and have vaccinated significant portions of their populations, CBS News reported. “Vaccine nationalism, where a handful of nations have taken the lion’s share, is morally indefensible,” Te...