The first child case of avian influenza (H5N1) was detected in California this week, according to the CDC, which is conducting an investigation into the case, including contact and exposure tracing

The H5N1 virus was found in a sample of unpasteurized milk at a store, prompting a recall of one batch. Health agencies have warned against the growing dietary fad.

A child in California has been infected with bird flu. It’s the first case of H5N1 influenza in a minor, and the number of human infections in the U.S. this year has now reached 55, according to the CDC.