Telemedicine has rapidly grown as a way to get medical care in the era of COVID-19, but a new study reveals that a doctor's evaluation by phone or video may miss crucial clues to impending health problems. Telemedicine visits accounted for about 35% of primary care visits between April and June … At the same time, office-based visits declined by half compared to the year before, researchers found. … The frequency of blood pressure checks on patients dropped by about 50% during the shift to telemedicine, and cholesterol assessments declined by 37%, researchers found.