Question

Jenner prepared a vaccine for the smallpox virus by employing
A. Attenuated smallpox virus
B. Small doses of smallpox virus
C. Attenuated cow's pox virus
D. Large doses of smallpox virus

Answer 1

The smallpox vaccine, introduced by Jenner in 1796, was the primary successful vaccine to be developed. He observed those milkmaids who previously had caught cowpox didn't catch smallpox and showed that inoculated vaccinia protected against the inoculated smallpox virus.

Complete answer: Smallpox was a communicable disease caused by one among two virus variants, Variola major and Variola minor. Jenner is documented around the world for his innovative contribution to immunization, and the ultimate eradication of smallpox.
Jenner took fluid from a cowpox blister and scratched it into the skin of James Phipps, an eight-year-old boy.
One blister rose abreast of the spot, but James soon recovered. On July 1, Jenner introduced the causative agent in the same boy again, this point with smallpox matter, and found out that he had developed an immunity against the virus, and hence didn't develop the disease this time.
The vaccine hence turned out to be successful.
The vaccine is formed from an epidemic called vaccinia, which may be a poxvirus almost like smallpox, but less harmful.

So, the correct answer is “Option C ”.

Note: It is important to note that although routine smallpox vaccination is not any longer performed on the overall public, the vaccine remains being produced to protect against bioterrorism and warfare.