While it's impossible to prevent all infections, you can help to decrease exposure and spreading:
Wash your hands frequently, especially after blowing your nose or after caring for a child with a sore throat.
If someone in your home has pharyngitis, keep his or her eating utensils and drinking glasses separate from those of other family members. Wash these objects thoroughly in hot, soapy water.
If a toddler with pharyngitis has been chewing...