The Centre has recalled the measles vaccine, after the administration of which four children died in Tamil Nadu's Tiruvallur district on Wednesday. Instructions have been issued to the States to stop the use of this vaccine until further orders, while the manufacturer has been asked to not to make any further supply, Health and Family Welfare Minister Anbumani Ramadoss told journalists here on Thursday. An experts committee would enquire into the causes of the death and submit its report within two weeks. Thereafter action would be taken, he said. The vaccine was manufactured and supplied by the Indian Immunologicals Limited, a wholly owned subsidiary of the National Diary Development Board under the Agriculture Ministry. Samples were sent to the Central Drugs Laboratory at Kasauli in Himachal Pradesh and its report would come in about a fortnight. The committee, comprising members from the Indian Council of Medical Research, the National Institute of Communicable Diseases and the Directorate-General of Health Services, and the Drug Controller-General of India, would visit Tiruvallur and inquire into the quality of the vaccine, status of the cold chain, quality of diluents, distribution and administration of the vaccine including the possibility of human error. Experts of the National Polio Surveillance Project of the World Health Organisation were already deputed to Tamil Nadu to assist the State government in investigations. The manufacturer had been given a contract to supply 90 lakh doses of measles vaccine on a trial basis. In the past four months, the company already supplied 45 lakh doses, of which two lakh doses were sent to Tamil Nadu. There was no complaint from any other part of the country, the Minister said. He gave an assurance that there would be no shortage of vaccine because of the ban on supply.