Dr. Sherri J Tenpenny, DO, AOBNMM, ABIHM,
08 October 2017.
Eggs have been used to manufacture vaccines for more than 70 years. It is a slow, cumbersome process. For up to eight months, more than 500,000 fertilized chicken eggs per day are used as “mini-incubators” to grow crops of cultured viruses. Using a labor-intensive method known as “candling,” each egg is examined by hand with a specialized light to ensure the chicken embryo is growing and the shell does not have cracks.