This early research looks at what happens when cells within the small blood vessels of the heart are exposed to high levels of the spike protein in a laboratory setting. It could help to start to explain some of the effects of severe Covid-19 infection, where levels of the virus are particularly high.

Sixteen brands of dog food may be associated with a heightened risk of heart failure in dogs, according to the Food and Drug Administration. The FDA isn't suggesting that pet owners stop feeding their dogs the particular brands yet, but some vets are already advising against "grain free" foods.