(A) Fleming in 1945 (X)
(B) Florey & Chain in 1975 (X)
(C) Flore & Chain in 1795 (X)
(D) Edward Jenner in 1795 (✔)
Answer:Immunization by vaccination was first introduced by Edward Jenner in 1795.
(A) Fleming in 1945 (X)
(B) Florey & Chain in 1975 (X)
(C) Flore & Chain in 1795 (X)
(D) Edward Jenner in 1795 (✔)
Answer:Immunization by vaccination was first introduced by Edward Jenner in 1795.
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