Bacterial infection: It is a condition in which harmful bacteria grow in the body and cause infection. It can target any part of the body and multiply very quickly. Bacteria come in three basic shapes, namely spherical, rod or spiral-shaped. Bacteria may be gram-positive (have thick cell walls) or gram-negative (do not have cell walls). Some common symptoms of bacterial infection include cough, fever and tiredness.
Fungal infection: It is a disease in which a fungus attacks the tissue and causes infection. Fungal infections may affect the skin and spread into bones, tissues, organs or the whole body. It may be contagious (spread from one person to another). The symptoms of a fungal infection include skin rash, darkening of the skin, peeling, itching, deformed toenail or vaginal discharge.
Viral infection: It is the multiplication of harmful viruses inside the body. The symptoms of viral infection include fever, sore throat, cough, headache, aches and pains, nausea, diarrhoea, vomiting, sneezing, runny nose or nasal congestion.