आबु आनि इबन सिनाया(आभिचेनना) 11थि जौथायनि गिबि बाहागोवाव बारदेरग्रा बा सनदेरग्रा बेरामफोरनि आखुखौ दिहुनदोंमोन।
Abu Ali ibn Sina (Avicenna) discovered the contagious nature of infectious diseases in the early 11th century.