The Duke of Cambridge was struck down with coronavirus in April but kept the diagnosis secret so as not to “worry” anyone, it has emerged. The Duke, 38, is said to have struggled to breathe during his illness and was treated by doctors before isolating at the family home, Anmer Hall, in Norfolk. He is said to have later told one observer at an engagement: “There were important things going on and I didn’t want to worry anyone." The Duke’s diagnosis came shortly after it was announced that both his father, the Prince of Wales, and Boris Johnson had contracted the virus. He was reportedly concerned that revealing his own plight to the nation would create further panic. Kensington Palace sources played down the severity of his illness.