Although no new cases are reported, tests show Ebola antibodies in 2 relatives.
A health ministry official also said two of the boy's family members are being treated for Ebola, and 177 contacts are under monitoring.
The WHO needs to be retooled to streamline emergency response, avoid political pressure, build country core capacities, and ensure adequate funding, an independent panel says.
Officials confirm 3 Ebola cases, involving a 15-year-old boy and family members.
One study explores virus survival in semen outside the body, and the other eye problems in a US survivor.
Experts recommend a separate entity within the WHO to handle outbreaks and emergencies.
One study found Ebola RNA more stable in blood than in urine, and an animal vaccine study showed promise.
Guinea's last patient is likely the outbreak's youngest survivor, born to a mother who died from her infection.
Also, researchers note vaccine storage limitations, and Australia eases screening.
Although officials are still tracing high-risk contacts, they reported no new cases.
