A's rebellion

Livy's world has been turned upside down in result of the seemingly never-ending pandemic. Livy is a special education teacher and has a love for helping people, especially those with disabilities. In fact, the most important person in Livy's life is her brother Archie, who has Down syndrome.

State borders are being closed. Quarantining is strictly enforced. Once they're ready, vaccinations eventually become mandatory and given to all US citizens on the same day. Three days after the mass vaccination, Livy and her friends watch the world unravel as different people experience different side effects of the shot.
All blood types are affected differently by the vaccine. The vaccine has an adverse effect on many people over the age of 35, instantly killing them. In those younger than 35, some blood types, such as A positive, thankfully appear unaffected. Other blood types such as AB positive, gradually show uncanny symptoms such as brain deterioration and skin discoloration. The rarest blood type, O positive, begins to show new abilities that seem supernatural.

Locked down in the state of Georgia, Livy watches in horror as her arch nemesis, Milo, appears to lead a group of A positives in taking control of all other blood types. AB's are being killed while O's are being enslaved, doing the bidding of Milo and his group. What will happen when one blood type thinks they can rule over all the others? Is this a world that Livy can live in or will she do something about it?