A Northern California child who consumed raw milk and became severely ill did not have the bird flu virus, according to tests conducted by the CDC.

Health officials are investigating possible cases of H5 bird flu after two cats died from consuming recalled raw milk, according to the Los Angeles County Department of Public Health.

Pasteurization is the process that rids milk of bacteria. But more people are opting for unpasteurized milk, also known as raw milk. In May, sales of raw milk rose more than 20 percent compared to the year before.