The President of Argentina has tested positive for Covid-19 , despite having the Russian-made vaccine Sputnik V in January. Alberto Fernández, 62, had the jab publicly in a Buenos Aires hospital on January 21 but came down with a fever and slight headache on Friday, prompting him to get tested. His diagnosis was confirmed with an antigen test, followed by a PCR test, over the weekend. Fernández said: 'I'm already ...