They should never have gotten out. A Centers for Disease Control and Prevention laboratory in Atlanta accidentally sent samples of the live Ebola virus to another lab down the hall where a technician handled them without the protection of a mask. The worker, along with several colleagues, will be monitored for symptoms for 21 days. The accident comes after the CDC mishandled dangerous samples of anthrax and the flu earlier in the year. The agency’s critics will only multiply with this latest mishap.