CNA Practice Test
Infection controlQuestion 204 of 1700

What is the most common mode of transmission of microorganisms in health care?

  1. Shared food trays in the dining room
  2. Air vents in the resident rooms
  3. Clothing worn by visitors to the facility
  4. The hands of health care providers
Show answer

Correct answer: The hands of health care providers

Your hands touch many people and objects.

Source: Nursing Assistant (Reuter), 4.4: Precautions Used to Prevent the Spread of Infection

Practice infection control

Questions last reviewed: 18 October 2026