A drive to administer vitamin A liquid to all children in the age group of six months to five years is to be undertaken in all anganwadi centres of Perambalur district in the last week of November. The drive is intended to prevent Vitamin A deficiency among children, which will cause deficiencies in eyesight. Vitamin A liquid will be administered in all anganwadi centres on November 23, 24, 26 and 27, according to an official release.