@WHO: RT @WHOEMRO: It’s #WorldImmunizationWeek! #VaccinesWork to give your child 👦🏽👧🏽stronger immunity, protection against diseases and a healthy future. However, over the past 3 years millions of children around the world did not receive a single dose of vaccine. Time for #TheBigCatchUp https://t.co/BCNDCjXOTT

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