(b) MW Beijernek Proposed contagium vivum fluidum means contagious living fluid. This phrases was first used to describe virus, characteristic in escaping from the finest mesh and available.
DJ Ivanowsky was a Russian Botanist who discovered the filterable nature of viruses one of the founder of virology.
Stanley Miller was a Jewish American chemist experimented on origin of life.
Robert Hooke was the first ta study and record cells using his primitive microscope.