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Naoko Uno, with a pipette in one hand and quiet determination on her face, goes carefully about her work inside her laboratory at the University of Georgia’s Center for Vaccines and Immunology. Uno, a PhD student, and several others are working on a potential universal vaccine for dengue. Dengue, often called dengue fever, is a mosquito-borne viral infection found mostly in tropical and subtropical countries. (Dhapte, 6/4)

Medical workers in Democratic Republic of Congo have given all the immediate contacts of Ebola patients in the city of Mbandaka an experimental vaccine as they try to thwart a disease that has killed around 25 people, the health ministry said. Ebola spreads easily through bodily fluids and the medical strategy involves vaccinating all the people a patient may have infected and then vaccinating a second "ring" of contacts around each of those potential sufferers. (Mwarabu, 6/4)