In the first case involving a child attending preschool, a 11-month-old female infant has contracted measles.This comes after the Communicable Diseases Agency (CDA) stepped up measures to contain the infection, according to a press release on Tuesday (Feb 24).The agency was notified of the case on Feb 17, which is also the fifth measles case involving an infant below 12 months of age this year.The 11-month-old attended a preschool in Singapore and was not yet due for her vaccination for measles, mumps and rubella.During the infectious period of the measles she contracted, she had attended school.Parents and children in close contact with the case have been notified by the preschool, and epidemiological investigations are ongoing.Among the close contacts with the child, all except four were up to date with their measles vaccination or were in progress of getting vaccinated against measles, CDA said.The four were subsequently issued quarantine orders, but these orders were rescinded following their receipt of vaccination or post-exposure treatment. Read more