BBC Radio 2 show tonight as her sister was taken to hospital after testing positive for Covid-19.The 55-year-old radio DJ said she was feeling "very scared" as her sister Frances, 53, was hospitalised after contracting the virus.Frances, who has a rare genetic syndrome called Cri du Chat, had been staying at a care home that suffered an outbreak of coronavirus last week.Jo took to Twitter to tell her followers that she was pulling out of her evening show as she penned: "I can't do my @BBCRadio2 show this evening.