One Example is
• Direct Contact: Skin infections and infestations such as impetigo, lice, scabies, ringworm, and herpes simplex are generally transmitted through direct contact. Also, contact with nasal and oral secretions of an infected person can spread infections such as chicken pox, influenza, measles, meningococcal meningitis, mumps, whooping cough, rubella and pink eye.
And there is
• Blood/body fluids: HIV, Hepatitis B and Hepatitis C are transmitted by direct contact between the blood and/or body fluids of an infected person and an uninfected person.