There has been a lot of speculation about whether Covid-19 was a naturally occurring disease. Here, biodefense expert Dr. Mark Kortepeter explains what scientists look for in determining whether a disease outbreak might be deliberate.
We talk to homelessness expert Rosanne Haggerty about the challenges and opportunities of the Covid moment, and why the mindset and language of public health is key to a future without homelessness.
A new study published in Nature Medicine indicates that immunity to infection by SARS-CoV-2 may fade quickly, at least in people with no or moderate symptoms.