11 Who invented the printing press?

Johannes Gutenberg

12 When was printing press invented?

1450

13 Who invented steam engine?

Thomas Newcomen

14 When was steam engine invented?

1712

15 When was vaccine invented?

1796

16 Who invented Vaccine for the first time?

Edward Jenner

17 Who is the father of Vaccines?

Edward Jenner

18 Who is the father of Immunology?

Edward Jenner

19 Who invented steam powered train?

George Stephenson

20 When was steam powered train invented?

1814