Many people, some from other health zones, attended funerals before the outbreak was identified and may have been exposed to the virus.
Unsafe burials and patient transport difficulties are among the outbreak challenges.
Responders are still investigating the source of the outbreak, along with the index patient's symptom onset and health visit history.
The index patient, a 34-year-old pregnant woman, was hospitalized on August 20 and died 5 days later.
France has now reported 63 local chikungunya cases from 16 different administrative units.
Researchers found high rates of neurologic conditions among patients who received certain monoclonal antibodies, women, older survivors, and those with underlying illnesses.
The WHO said B, C, and D subtypes cause 1.3 million deaths each year and that hepatitis D is now classified as carcinogenic to humans, alongside B and C.
Half of the survivors had multisystem symptoms that resulted in an inability to perform basic activities of living.
India's Nipah patient is from an area that has reported multiple outbreaks since 2018.
Ugandan health officials will maintain Ebola surveillance and continue risk communications and patient follow-up.
