In 1880 Pasteur created his first vaccine. What did it vaccinate against?

In 1880 Pasteur created his first vaccine. What did it vaccinate against?

• A. Rabies
• B. Anthrax
• C. Chicken cholera
• D. Smallpox

Answer: (C)

Pasting the idea that exposing the immune system to a weakened form of a pathogen can provide protection is what this item tests. In 1880, Louis Pasteur showed this idea in practice by creating a vaccine against chicken cholera. He found that aging or weakening the cholera bacterium made it far less dangerous, but still able to train the chickens’ immune systems. When vaccinated chickens were later exposed to the virulent form, they survived, proving that a deliberate attenuation could confer immunity. This was a landmark moment because it demonstrated the method of vaccination through weakened pathogens and laid the groundwork for future vaccines. The other diseases listed did have vaccines, but not the first one Pasteur developed: smallpox vaccines existed long before him, and later he produced vaccines against anthrax and rabies, with rabies coming after his chicken cholera work.

Pasting the idea that exposing the immune system to a weakened form of a pathogen can provide protection is what this item tests. In 1880, Louis Pasteur showed this idea in practice by creating a vaccine against chicken cholera. He found that aging or weakening the cholera bacterium made it far less dangerous, but still able to train the chickens’ immune systems. When vaccinated chickens were later exposed to the virulent form, they survived, proving that a deliberate attenuation could confer immunity. This was a landmark moment because it demonstrated the method of vaccination through weakened pathogens and laid the groundwork for future vaccines. The other diseases listed did have vaccines, but not the first one Pasteur developed: smallpox vaccines existed long before him, and later he produced vaccines against anthrax and rabies, with rabies coming after his chicken cholera work.