Dr Athula Kahandaliyanage explained that this special vaccination programme will be carried out to contain the spread of measles after sporadic cases were reported among internally displaced people in the past few months.
Medical staff will carry out the vaccination in 30 health centres in Vavuniya with the help of about 1,200 volunteers.
Once the operation is completed in Wanni they will move to Jaffna and Trincomalee districts for the next phase.
Human Rights Watch (HRW) released a report on 28 July, saying that sanitary conditions in Tamil refugee camps have worsened.
“Many are overcrowded, some holding twice the number recommended by the UN High Commissioner for Refugees,” the report said.
Moreover, “[a]ccording to the UN, there is a shortage of latrines and access to water is inconsistent, causing hygiene problems. In June alone, health officials recorded more than 8,000 cases of diarrhoea, as well as hundreds of cases of hepatitis, dysentery, and chickenpox.”