Seeding Hope Among the Ashes — Vincent Berg

The man telling the country how to survive an apocalyptic event must reach across the country to teach people how to heal themselves. David's saga continues, only without David, the man who discovered the cure to the diseases afflicting mankind. Instead his followers set off in multiple directions, taking his cure to other communities in the hope everyone can treat their own people while not getting killed. This sequel follows each girl as they journey to different cities, trying to convince reluctant survivors to trust them to make them sick A two day meteor storm wiped out the world's power and communications, as well as triggering a series of plagues which decimated the world. With no prevention, the world went into seclusion, avoiding one another. One man and his daughter devise a treatment, infecting people by injecting them with their plasma, which also transfers their ability to survive. Threatened to be overwhelmed as people learn about their treatment, David sets those he's treated out into the world to sicken others in the hopes of spreading his treatment beyond himself. This book is PG rated (for language), though the previous two books in the series contain adult themes.