The most common symptoms of COVID-19 are fever, tiredness, dry cough, and difficulty in breathing. Some patients may have body aches and pains, loss of smell, nasal congestion, runny nose, sore throat, or diarrhea. These symptoms usually start mildly and gradually become serious. Some people become infected but do not develop any symptoms and do not feel unwell. Most people (about 80%) recover from the disease without needing hospitalization. Around 1 out of every 6 people who get COVID-19 becomes seriously ill and develops difficulty in breathing. Older people, and those with underlying medical conditions like high blood pressure, heart problems, cancer, or diabetes, are more likely to develop serious illness.