Covid-19 tore through Downing Street in the first wave of the pandemic. The Jack Russell, Dilyn, was feared to have contracted the virus after his started acting out of the ordinary.Dilyn was not his usual chirpy self and was refusing to go on his usual walkies, according to reports.The scare came back in April when his owner Boris was fighting for his life in intensive care.Boris’ fiancee, Carrie Symonds, had posted a pic of her snuggling up to Dilyn while she was self-isolating, having also contracted the disease at the same time.Ms Symonds and Health Secretary Matt Hancock were among those in the PM's inner circle to contract the virus.A source told The Sun: “It’s well known that the virus did the rounds through Downing Street, but it.