What happens if you get the first vaccine, then get COVID-19 – testing positive – what about the second shot?

Cough, cough, sneeze, sniffle. If you have allergies, you know the routine. But with COVID-19 symptoms also being very similar, you're probably wondering how to distinguish between the two. One of our allergy specialists discusses the differences and when to seek medical advice.

Another COVID-19 vaccine has been authorized! This one works a little differently than the mRNA vaccines – and it only requires one dose. Get the facts about the new Johnson & Johnson vaccine. See what’s different.

After more than a year of COVID-19, these milestones stand out.

Question: If I’m having unprotected sex, but I have a mask on, will it protect me from COVID-19 if my partner has it?

I have read that the vaccine causes infertility. That would be devastating. I guess it interferes with the formation of the placenta.

Does drinking alcohol affect the COVID-19 vaccine effectiveness?

The impact of the COVID-19 pandemic is evident in many ways, including subtle, secondary problems that specifically affect women.

Have questions about the COVID-19 vaccines? Infectious diseases expert Mark Rupp, MD, and EMS physician Eric Ernest, MD have answers.

Scientists have learned that your blood type does seem to make a difference on your odds of catching COVID-19 and having a worse disease. See which blood types are more likely to get sick.