20 years before Jenner a Dorset Farmer, Benjamin Jesty, had carried out the same procedure to protect his family against smallpox but rarely gets any credit.
…………………………………………………………………………………………………………. यो मुलुक सिंगापुर जस्तो बनिसकेको छैन मात्र राजनीतिक परिवर्तन...