Question

who invent bacteria ?

Answer 1

Van Leeuwenhoek discovered "protozoa" - the single-celled organisms and he called them "animalcules". He also improved the microscope and laid foundation for microbiology. He is often cited as the first microbiologist to study muscle fibers, bacteria, spermatozoa and blood flow in capillaries.

Answer 2

I am not sure but

Dr Alexander Fleming

he invited penicillin

I hope it helps you