The majority of virus-infected individuals will experience a mild to severe respiratory disease and will recover without the need for special care. However, some people will get serious illnesses and need to see a doctor. Serious sickness is more likely to strike older persons and those with underlying medical illnesses including cancer, diabetes, cardiovascular disease, or chronic respiratory diseases. COVID-19 can cause anyone to become very ill or die at any age.
COVID-19 primarily spreads through respiratory droplets that are produced when an infected person talks, coughs, or sneezes. If someone nearby inhales the droplets or touches surfaces that have been exposed to them and then touches their face (mouth, nose, or eyes), they could become infected.
This model shows an infection's rapid growth reflects an exponential increase in the rate of transmission. On top of that, the majority of patients with minor symptoms will probably recover from the virus with the aid of medical care and isolation, boosting each person's chance of recovery.
Source: https://www.who.int/health-topics/coronavirus#tab=tab_1