Agriculture Secretary Brooke Rollins is expected “in the coming days” to announce a new strategy to fight the escalating outbreak.

The price of eggs at U.S. grocery stores has climbed to a record high, nearly doubling from a year ago, as outbreaks of bird flu have led to shortages by wiping out millions of hens.

Over the last 30 days, 151 flocks have been confirmed to have avian flu, affecting more than 23 million birds, according to the Animal Planet Health Inspection Service part of the USDA. Dr. Paul Offit, of the FDA Vaccine Advisory Committee, says people could also become sick.