The novel “Tomorrow’s Kin” by Nancy Kress was published for the first time in 2017. It’s the first book in the Yesterday’s Kin trilogy.
Dr. Marianne Jenner is celebrating the publication of a scientific article about a rare mutation in human mitochondrial DNA when FBI agents burst in to ask her politely but also really firmly to come with them to New York. The only explanation she gets is that her presence was requested by the aliens who arrived some time earlier on Earth.
Involved in the first face-to-face encounter with the aliens, Marianne Jenner hears from them that a cosmic cloud containing a lethal virus is heading towards the Earth. The virus has already exterminated two alien colonies that crossed the cloud so the Denebs, as the aliens have been called because they come from the direction of the star with that name, and the Earthlings have to work together to create a vaccine.