Final answer:
The nurse needs to include proper handwashing techniques and immunizations when teaching patients and families about preventing infection at home.
Step-by-step explanation:
When teaching patients and families about preventing infection at home, the nurse needs to include proper handwashing techniques and immunizations. Handwashing is essential for preventing the spread of infections and should be done frequently and correctly using soap and water for at least 20 seconds. Immunizations, such as vaccines, play a crucial role in preventing infections and keeping individuals and communities healthy.