The Boy on the Bridge by M.R. Carey

A terrible virus has transformed most of humankind into “hungries”, a zombie-like state. A group of scientists and military personnel has been ordered to northern Scotland where the last transport disappeared, ostensibly to gather samples for study as they desperately seek to find a cure. Dr. Samrina Khan has taken charge of one of their researchers, a young but brilliant savant named Stephen Greaves whose secret nighttime forays has led him to investigate a nest of child “hungries” exhibiting cognitive behaviors unlike the others. Stephen believes this find could be the key to finding a cure. Meanwhile, mistrust among military and scientific groups has escalated, creating even more tension within ranks. After a deadly skirmish with the child hungries, the group heads back to base knowing they are now being actively hunted. Now one of their own aboard is infected, and Stephen is racing to save her…a chilling sequel to Carey’s The Girl With All The Gifts.