A Digital Flu Intervention for People With Cardiovascular Conditions

Inclusion Criteria: * Age 18 years or older * Resides in the U.S. * Speaks, reads, and understands English * Has self-reported being diagnosed with any of the following cardiac conditions below in their Achievement profile: * Atrial Fibrillation or Afib * Abnormal or irregular heart rhythm, other arrhythmic heart disease * Cardiac arrest, or heart attack (myocardial infarction) * Coronary heart disease like a heart blockage, treated with medications, a stent in the heart, or sometimes bypass surgery- * Heart failure, like congestive heart failure * Stroke or cerebrovascular accident (CVA) Exclusion Criteria: * Participated in Step 1, Part 2 semi-structured interviews used to obtain feedback on the intervention messages