When an anthrax case is confirmed, public health authorities are immediately notified and a coordinated response begins, focusing on identifying the source of exposure, assessing whether it is natural, occupational, or intentional, and determining who else may be at risk. This typically includes contact tracing, environmental testing for spores, securing or restricting affected areas, and issuing guidance to healthcare facilities. If exposure may involve multiple people, authorities may start post-exposure prophylaxis (mass antibiotics and sometimes vaccination) for exposed groups, communicate clearly with the public to prevent panic, and coordinate animal health, law enforcement, and emergency services to contain the risk and prevent further cases.