Space Transformer (1989)

"The Earth is in danger of attack by a space renegade, Tongs, and his followers. The only one who can direct a successful counterattack is Ivy, the world's most amazing and intelligent girl.
But when she is shot with bacteria beings who attack her body from within, a microscopic crew is injected into Ivy to battle the invaders. So now the battle for the Earth must now be fought in inner-space as well as outer space." - Official Synopsis. Hong Kong English Dub of the 1985 South Korean cartoon "Micro Force Diatron 5" (마이크로 특공대 다이야 트론 5 )