Among the many remarkable things that have happened since the COVID-19 pandemic began is that a lot of our usual medical care has simply stopped. According to a recent study, routine testing for cervical cancer, cholesterol, and blood sugar is down nearly 70% across the country. Elective surgeries, routine physical examinations, and other screening tests have been canceled or rescheduled so that people can stay at home, avoid being around others who might be sick, and avoid unknowingly spreading the virus. Many clinics, hospitals, and doctors’ offices have been closed for weeks except for emergencies. Even if these facilities are open, there’s understandable reluctance to seek medical care where an infected person may have been just before you. So which health concerns can safely wait — and which should not?