dairy

The vegan plan included fruits, vegetables, grains, and beans, while the Mediterranean plan featured fruits, vegetables, legumes, fish, low-fat dairy, and extra-virgin olive oil.

More than half of Japan's dairy produce comes from Hokkaido, the northernmost of its main islands.

At most, traditional dairy farms calves are separated from their mothers within 24 hours of their birth.

For instance, the H5N1 virus circulating in dairy cattle in North America is one mutation away from being able to spread easily between people.

"A lot of farms will be in similar positions having borrowed money to put up a beef shed or for a dairy parlour or to buy a combine," Mr Aveling said.