The study comes amid an outbreak of the Sudan Ebola virus, which has already killed a nurse and infected others.
Uganda has kicked off a clinical trial of a vaccine against Ebola that killed one person in the outbreak declared last week.
Health workers and other people exposed to the strain are being targeted in the trial which began four days after Uganda announced the death of a nurse in the capital, Kampala.
Two more cases were confirmed on Monday in relatives of the first victim.
It is the sixth time Uganda has been hit by an outbreak of the Sudan strain of the virus, for which there is…