A rest home resident with Covid-19 was in critical condition in hospital last night.The senior, 66, deteriorated after he developed a fever and cough at the Matilda Smith Williams nursing home in Devonshire on Sunday.The man was admitted to the King Edward VII Memorial Hospital on Monday and was put on oxygen to help him breathe.He is said to have shown some improvement.Matilda Smith Williams seniors home did not respond to a request for comment.David Burt, the Premier, said on Thursday night: “I have been informed of possible cases at nursing homes.“Earlier this week, I directed the Ministry of Health to have all residents and staff in affected nursing homes be tested. We have an aggressive testing regime and we will test all possible cases, to ensure we break any chain of transmission.”Mr Burt added: “We have had four deaths to date and I will do everything in my power to minimise future deaths.”Kim Wilson, the Minister of Health, earlier declined to comment on whether Covid-19 had emerged in nursing homes.Ms Wilson said at a Thursday press conference that it would be “totally inappropriate for me to comment, as far as providing information that might or might not identify” the latest people to contract Covid-19.She added that the Government’s public health emergency response team had worked with rest homes to boost safety.She said that included “specific guidelines”, such as social-distancing to prevent the spread of the coronavirus.Ms Wilson added: “We have been working with rest homes, because we appreciate that is our most vulnerable population.”Homes for the elderly worldwide have been vulnerable to outbreaks of the virus.Ms Wilson said it was “several weeks” since visits to rest homes were banned, except for terminal cases.