Dear Doctor: My gym has been closed for months, so I’ve been doing online workouts during the pandemic. A guy in our session keeps talking about something called “fasted cardio,” and how it’s helping ... more

Dear Doctor: I heard on the news about a coronavirus medicine made with blood from people who were sick and got better. But my husband says it’s actually a blood test to see if someone ever had the vi... more

Dear Doctor: I had a coronavirus test, and it was negative. Then I had the antibody test, and I was surprised when it came back positive because I hadn’t been sick. How do these coronavirus tests work... more

Dear Doctor: Would you please consider doing a recap about the coronavirus -- especially about how it spreads? There’s a lot of information floating around, and it’s getting hard to sort through the n... more

Dear Doctor: I'm 30 years old, and I have a lump in my breast, which imaging tests suggest is a fibroadenoma. I'm getting married in six months, and I am leaning toward having a biopsy so I won’t worr... more

Dear Doctor: I live alone, and stay-at-home orders have been hard. I’ve heard people say that being lonely is really bad for your health, and now I believe them. What problems can it cause? Also, I’m ... more

Dear Doctors: What can you tell me about Kawasaki disease? I read that children who had COVID-19 are getting it. But I thought children were supposedly safe from the virus. Why has that changed?... more

Hello, dear readers, and thank you for joining us for the continuation of our monthly letters column. We received so many questions related to the coronavirus and COVID-19 that we needed to address th... more

Dear Doctor: Our city has asked us to wear a face mask when we leave the house. Needless to say, my wife and I have never done this before. Does our 5-year-old son need a mask, too? Any guidance or ho... more

Dear Doctor: Everybody is talking about the coronavirus right now, but I still don’t really know what a virus is. How do they work? Why don’t antibiotics kill them?... more

Dear Doctor: I just read that a coronavirus vaccine won’t be ready until at least next year. How do vaccines work? And why do they take so long to make?... more

Dear Doctor: Why do you have to wash your hands with soap and warm water for at least 20 seconds? Are they not getting clean if you’ve only got cold water? And why is 20 seconds the magic number? What... more

Dear Doctor: Every time I turn on the news and hear about the coronavirus, the symptoms keep changing. Why is that? How do we even know when we should go see a doctor?... more