Diseases which suddenly occur and develop quickly are called "Acute illnesses". An acute illness may be severe and last a relatively short period of time, while a chronic disease is progressing slowly over years and tends to be a problem for an extended period of time.
Broken bone, bronchitis, burn, common cold, pneumonia, strep throat, and flu.
Broken bone, bronchitis, burn, common cold, pneumonia, strep throat, and flu.