Research and opinions

A vaccine to prevent coronavirus disease 2019 (COVID-19) is perhaps the best hope for ending the pandemic.

Understand what's known about herd immunity and what it means for coronavirus disease 2019 (COVID-19).

The UK has become the first country in the world to approve the Pfizer/BioNTech coronavirus vaccine, paving the way for mass vaccination.

COVID-19 symptoms can sometimes persist for months. The virus can damage the lungs, heart and brain, which increases the risk of long-term health problems.

The emotional and psychological impacts of the pandemic can lead to feelings of hopelessness and thoughts about suicide. Learn the signs and what to do.

Is COVID-19 more dangerous for kids with asthma? Should they wear face coverings, or will it exacerbate their breathing issues?  Are children with asthma more susceptible to developing COVID-19? 

You may feel stressed and anxious about COVID-19 — and so may your kids. Try these strategies to talk with them and help them cope.

If you are pregnant, you recently delivered a baby or you are breast-feeding, you're probably concerned about the impact of coronavirus disease 2019 (COVID-19).