Defend tissue samples from mutating viruses!
Towers: Antibiotic (DoT), Vaccine (prevents spread), WBC (seeks viruses), CRISPR (converts viruses). Click type then click on petri dish to place.
Viruses: Cold, Flu, Ebola, Superbug. Each has mutation chance — mutations create random new properties.
Infection: Viruses infect cells. Too many infected = lose. Use Vaccine to cure cells.
RP (Research Points): Earn from kills. Spend on upgrades and vaccines.