You mix air + bacteria in the game.
However, in real life, the flu is a virus not a bacteria and it is not airborne, it is more often passed along by touching things with your hands. It can remain in the air only for short distances from someone's cough or sneeze.
air + bacteria = FLU
No
No
2air1lighting
Flower. Sand
golem+life
fire+air
air + stone
sand+fire
bacteria+milk
scientist + energy
Sand + egg