Joint Editors: Jayasuriya Dr. Lucian, Wimalaratne Dr. Omala, Perera Prof. Jennifer & et al SLMA Guidelines and Information on Vaccines - 7th edition - Colombo 7 Sri Lanka Medical Association 2020 ISBN: 978-955-9386-50-6 Nat. Bib. No.: 005522 Dewey Class. No.: 615.371(036)S45