17. Which is not true of coronavirus disease (COVID-19)? (A) COVID-19 is an infectious disease caused by the SARS-CoV-2 virus (B) Older people and those with underlying medical conditions like cardiovascular disease or diabetes are more likely to develop serious illness (C) Older people and those with underlying medical conditions like chronic respiratory disease or cancer are more likely to develop serious illness (D) Get vaccinated when it's your turn and follow local guidance (E) All of the choices are correct