The Revival Serum is a new feature that incentivizes players to bring back old Squadmates to Zombie Slayer. When you send a Revival Serum the player that receives it will get some rewards as soon as they come back to the game to help them jump right into gameplay. Based on how much GP they earn through their next four seasons you can both earn Weekly rewards with the possibility for a bonus reward at the end of this period. See the info in-game for more details about the Weekly and Bonus rewards.
Please note that the ability to send Serums is only available through Facebook canvas and is not supported on KanoPlay.
Where to Start
If you are eligible you will see a new tab on your Profile called "Revival Serum". Click on the "Tell Me More" button to see specifics of the rewards available and to start sending Serums.
How to Send
Once you have opened the Revival Serum menu you will see your Candidate List. Choose from any of these candidates to send a Serum to which will show up on their side as a Facebook request. Once a Serum is sent this Squadmate, they will be moved into the Pending tab where they will remain until they rejoin the game or five days pass.
How to Track Progress
If you have any "Active" Serums you can track your Squadmate's progress by clicking the Active tab. Here you will see a week by week breakdown of their GP progress. At the end of each season, rewards are able to be collected with the Bonus reward becoming available at the end of the fourth season since your Squadmate rejoined.
On the other side of this your Squadmate who has rejoined Zombie Slayer can see their own progress by going to their own Profile and looking for the "Revival Serum" tab. This will show their week by week GP progress as well as their progress towards the bonus rewards. Your rejoined Squadmates will also be able to collect rewards at the end of each season and the Bonus at the end of four seasons.