Bird flu is back. Will egg prices rise as it infects more and more farms?

It might now be a distant memory, but by the end of last winter, the average cost of a dozen eggs soared to a record high of $6.23. (It’s now at $3.49.)

The cause was H5N1, a highly pathogenic strain of avian influenza — or bird flu — that wild birds shed near farms as they migrate for the…