Infectious Diseases: Symptoms, Prevention, and Treatment

🩺 Medically reviewed by the Health Decoded Guide Editorial Team · Last reviewed: July 2026

Browse infectious disease topics below.

🟧Common Viral Infections

• Common cold
• Flu (influenza)
• COVID-19
• Chickenpox
• RSV infection
• Measles
• Mumps
• Hand, foot and mouth disease

🟧Bacterial Infections

• Sinus infection
• Typhoid fever
• Tuberculosis
• Urinary tract infection (UTI)
• Bacterial throat infection

• Cholera
• Impetigo
• Cellulitis
• Gonorrhoea
• Syphilis
• Scarlet fever
• Bacterial meningitis
• Tetanus
• Diphtheria
• Bacterial pneumonia
• Helicobacter pylori (H. pylori) infection

🦟Mosquito-Borne Infections

• Malaria
• Dengue fever
• Ebola virus disease
• Yellow fever
• Lassa fever
• Mpox
• Schistosomiasis
• Onchocerciasis (river blindness)
• African trypanosomiasis (sleeping sickness)

🟧Digestive Infections

• Gastroenteritis
• Food poisoning

• Typhoid fever
• Cholera
• Hepatitis A
• Hepatitis E

🟧Skin and Eye Infections

• Skin infections
• Ringworm
• Impetigo
• Cellulitis
• Scabies
• Fungal skin infections

🟧 Eye & Ear Infections

• Eye infections
• C onjunctivitis (red eye)
• Ear infections

🟧Sexually Transmitted & Blood-Borne Infections

• HIV infection

• Hepatitis
• Chlamydia
• Gonorrhoea
• Syphilis
• Genital herpes
• HPV infection
• Trichomoniasis
• Hepatitis B
• Hepatitis C

🟧 Serious & Other Infections

• Meningitis
• Sepsis
• Rabies
• Infectious mononucleosis (glandular fever)
• Osteomyelitis
• Infective endocarditis