A person is suffering from a high-grade fever. Which symptoms will help to identify if he/she is suffering from Typhoid, Pneumonia or Malaria?

A person is suffering from a high-grade fever. Which symptoms will help to identify if he/she is suffering from Typhoid, Pneumonia or Malaria?

Answer.

If the person has sustained high fever (39° to 40°C), weakness,
stomach pain, constipation, headache and loss of appetite, it is
Typhoid. If the person has fever, chills, cough and headache; and the lips and fingernails turn gray to bluish, it is Pneumonia.
If the person has chills and high fever recurring every three to four
days then, it is Malaria.