The nurse is reviewing the recommended preventative care for clients with asthma, chronic bronchitis, and emphysema. Which health care measure is most important for the nurse to recommend to these clients?

Use nasal or cough tissues followed by handwashing at all times.

Ensure supplemental oxygen and respiratory medications are available at all times.

Get annual flu and pneumococcal vaccine polyvalent (PPSV23) vaccines.

Avoid large crowed areas during the colder months of the year.