Several months into the pandemic, medical experts say that Asthma hasn't been a significant risk factor. Even though CDC recommended at the beginning of the pandemic that COVID-19 patients should not be treated with corticosteroids, because steroids increase the need for ventilation, length of illness and chance of dying, this did not apply to people who are already on steroids for underlying conditions.

Other viruses can affect the heart, but experts say that COVID-19 can cause cardiac complications that are a major cause for concern, especially among those with preexisting heart disease. Although experts don't yet have conclusive data on the percentage of patients who have heart damage as a result of COVID-19 infections, estimates run as high as 25 or 30 percent.