A community health nurse is providing teaching to clients at an assisted living facility. Which of the following statements by a client is an example of primary prevention?

"I use a salt substitute instead of salt to keep my heart failure under control.”.

"I got my pneumonia vaccine 2 years ago and get my annual flu shot every fall.”.

"I use my prescribed eye drops twice a day so my glaucoma doesn't get any worse.”.

"I log my blood pressure weekly and take the list to each appointment with my doctor.”.