The authorities are inspecting homes, tracking purchases of fever medicines and deploying drones as they urge people to join an eradication campaign that echoes Covid measures.
Fogging with insecticide at a hospital in the Chinese city of Foshan, where officials are battling an outbreak of chikungunya, a painful mosquito-borne viral disease.
Dr. Monarez, who has been the acting head of the Centers for Disease Control and Prevention since President Trump took office, was the president’s second pick for the job.