The quickest way to get sick is through contact with bodily fluids or surfaces containing bodily fluids from a sick individual, according to HealthyChildren.org. When an infected surface or fluid is touched, the hands must come in contact with the nose, eyes or mouth to quickly transmit the illness.
Contact with someone who has an active fever can also expedite the transmission of the virus to others, according to HealthyChildren.org. To prevent the spread of illness, it is recommended that anyone showing signs of illness, including fever, cough, sneezing or sniffling, should be kept away from other healthy individuals while the infection is active. For school-aged children, when vomiting, diarrhea, impetigo, scabies or trouble breathing occur, they should not be sent to school to prevent the spread of infectious disease.
Because most infectious diseases are transmitted through a person's own hands, good hygiene can often prevent the spread of disease, according to Centers for Disease Control and Prevention. Washing hands before eating, preparing food, caring for a sick person or treating a wound are effective in preventing infection. It is also important to wash hands after using the bathroom, blowing one's nose, petting animals and touching garbage. Scrubbing the hands for 20 seconds, rinsing them and then drying them is the most effective way to wash the hands.