No one expected the first Covid-19 vaccine to be as good as it was. “We were hoping for around 70 percent, that’s a success,” says Dr Ann Falsey, a professor of medicine...

For years, idealistic hacktivists have disrupted corporate and government IT systems in acts of protest. Cybercriminal gangs, meanwhile, have increasingly held hostage the same sort of enterprise networks with ransomware, encrypting their...