Inclusion Criteria:

• 1. Subject age 18 or older
• 2. Receives all primary and specialty care within the MassGeneral Brigham system
• 3. A history of one of the following diagnoses:
• 1. Asthma
• 2. Cystic Fibrosis
• 3. Chronic obstructive pulmonary disease
• 4. Congestive heart failure
• 4. At least four documented exacerbations of the above disease in the past 12 months as defined by the following corresponding criteria:
• a. Asthma exacerbation: i. a minimum 3-day course of oral steroids ii. for patients on chronic steroids, an increased dose of steroids.
• b. Cystic fibrosis exacerbation: a minimum 7-day course of systemic antibiotics (not including any chronic suppressive antibiotics).
• c. Chronic obstructive pulmonary disease exacerbation: all three of (1) increase in frequency and severity or severity of cough, (2) increase in volume and/or change of character of sputum production, and (3) increase in dyspnea, and requiring treatment with short-acting bronchodilators, antibiotics, and oral or intravenous glucocorticoids.
• d. Congestive heart failure exacerbation: volume overload (as evidenced by weight gain or elevated BNP \[\>100 pg/mL\]/NT-proBNP \[\>300 pg/mL)) plus dyspnea plus diuretic treatment (new or increase from baseline).
• 5. Subject able to provide informed consent.

Exclusion Criteria:

• 1. Subjects with a history of adhesive or tape allergy or skin reaction.
• 2. Subjects with pacemaker, Automatic Implantable Cardioverter Defibrillator (AICD) and other implantable electronic devices.
• 3. Subjects with neuromuscular disease, seizures and/or Parkinson's disease.
• 4. Subjects with expected out of state travel within a 90-day period or travel to a location with no internet access.
• 5. Subjects enrolled in hospice care or life expectancy less than three months.
• 6. Subjects living more than 60 miles away from Massachusetts General Hospital. -