Question

please solve this questions

Answer 1

vaccination was discovered by Edward Jenner

Answer 2

It was Edward Jenner who discovered vaccination , a doctor in Berkeley in Gloucestershire, who established the procedure by introducing material from a cowpox vesicle on Sarah Nelmes, a milkmaid, into the arm of a boy named James Phipps. Two months later he inoculated the boy with smallpox and the disease did not develop.