Everybody has the equal chance of getting infected if you don't follow all the precautions to avoid acquiring COVID-19 infection it is not that cardiac patient gets infected easily diabetic patients get infected easily. But yes the patients who are having any co-morbities are prone to land up in complications and get critically ill compare to the counter person.

Any patient who have comorbidities like cardiac problems, lungs problems, immunocompromised are more prone. But recovery rate is good.