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Getting a coronavirus vaccine in record time is hard. Distributing it to tens of millions may be equally daunting.

He had headaches, but his condition was rare, with no clear explanation or treatment

When, why and how to wear a mask during this pandemic, according to the experts

States with stricter covid-19 restrictions watch lax neighbors warily, knowing the virus does not respect borders

Asked and answered: What readers want to know about coronavirus

About 82 percent of those 50 and older complain of ageism, research says

African American children are more likely to die after surgery than their white peers, researchers find

From swabs to antibodies: How to understand your coronavirus test results

Disappearance of covid-19 data from CDC website spurs outcry

Top health official violated federal contracting rules, HHS inspector general finds

How time reshaped WHO’s noble, ambitious goals in 1978 for global heath care

Wooing patients back is tricky business as coronavirus spikes in many states

Diets high in fruits, vegetables may help reduce Type 2 diabetes by 50 percent, study say

Long delays in getting test results hobble coronavirus response

Your mask feels uncomfortable? Get over it. As a surgeon, I know how vital they are.

To estimate your dog’s age in human years, you’re going to have to learn a bit more math

Racial disparities seen in how doctors treat pain, even among children

Racism in care leads to health disparities, doctors and other experts say as they push for change

Covid-19 upends major, years-in-the-making study on babies and poverty

Republican governors who opposed mask mandates start to soften