It's believed the Bronx tiger got sick from a human, and as of March 25, at least two dogs in Hong Kong had tested positive for the coronavirus after close human contacts also did, according to the American Veterinary Medical Association.

• Wendell Steavenson’s “Flour power” (The long read , 10 October) continues the widespread fashion of the fetishisation of food in the guise of promoting healthy eating.• Read more Guardian letters – click here to visit