John Bishop has given fans an update on his health after revealing he tested positive for Covid-19.On Wednesday, the comedian, 54, and his wife Melanie confirmed they had contracted the virus, receiving their positive results on Christmas Day.Now, John has assured fans he is fighting to return to full health, admitting he feels “stronger” with each passing day.The Liverpudlian comic took to Twitter to share a statement with fans, having been inundated with messages since announcing he'd contracted the deadly virus.He said: "Thank you for all the messages of support regarding my recent positive Covid test."'I have been overwhelmed and moved by the amount of messages privately and publicly.