Reopening the U.S. economy is complicated by some troubling scientific questions about the new coronavirus that go beyond the logistics of whether enough tests are available. In an ideal world, we'd ...

Recent vaccination announcements have led to some confusion. Four physicians weigh in on who should get vaccinated and when Shreyas Teegala and Simar Bajaj Since the first Covid-19 vaccines were ...

A pharmacist prepares to administer a Covid-19 booster shot to help protect a patient against the Omicron subvariants BA.4 and BA.5. Scott Olson / Getty Images Every day in the United States right now ...