Some people who are infected may not get sick at all, some will get mild symptoms from which they will recover easily, and others may become very ill, very quickly. From previous experience with other coronaviruses, the people at most risk of serious infection are:
people with compromised immune systems (e.g. cancer)
elderly people
Aboriginal and Torres Strait Islander people, as they have higher rates of chronic illness
people with diagnosed chronic medical conditions
very young children and babies*
people in group residential settings
people in detention facilities.