Activation energy ........
Answer:
I believe it is : water and nitrogen
Explanation:
Tuberculosis vaccines are vaccinations intended for the prevention of tuberculosis. Immunotherapy as a defence against TB was first proposed in 1890 by Robert Koch. Today, the only effective tuberculosis vaccine in common use is bacilli Calmette-Guérin, first used on humans in 1921.
Susan B. Anthony include rhetorical question to strengthen her argument.
