sentences:  Though a native Christian, Dias was not from the elite social circles from which his predecessors had originated and is recognised as having worked his way towards social and professional recognition through personal effort and merit, in what was at the time, a highly stratified society.Dias was a strong proponent of modern European medicine and vaccination in particular, as opposed to the variolation or inoculation techniques that were common among the local population.He recommended the creation of vaccine parks in different districts despite the challenge this was to local beliefs about ritual and body pollution.