One frail OAP was allegedly jabbed in the arm with a "dart-like" injection and charged £160 - before the same man returned to her home days later to ask for another £100. And this morning, Gareth Shaw of consumer group Which? urged people to be especially cautious as doorstep cons have made a huge resurgence during the pandemic. "It's really, really serious stuff. They're targeting the most vulnerable and really taking advantage of their uncertainty," he told Sky. Fraudsters go around posing as the NHS and actually administering a 'vaccine'. It's typically a saline solution. It's an absol...