You are the immune system.Fight with virus and keep yourself alive.
Deploy immune cells smartly and hold on until the end.

• Cell
  
  You need protect them. Healthy cell produce ATP, use ATP to spawn cells.

• Macrophage
  Eat all organism nearby, no matter it's virus, infect cell or healthy cell.

• T-cell
  Detect,catch and research virus.

• B-cell
  After completion of virus research, you can spawn B-cell.
  They will shoot virus down with antibody.