DO MEMO NO. 471, S. 2021. IATF VACCINATION REQUIREMENTS FOR PERSONNEL REPORTING ON-SITE BEGINNING 01 DECEMBER 2021 Posted on December 14, 2021 by DepEd Mandaluyong Leave a comment DO MEMO NO. 471, S. 2021. IATF VACCINATION REQUIREMENTS FOR PERSONNEL REPORTING ON-SITE BEGINNING 01 DECEMBER 2021 Memorandum Numbered