Vaccines are among the most powerful inventions in history, making once-feared diseases preventable. With continued research, investment and collaboration, we can save millions more lives today and in the next 50 years. #HumanlyPossible #WorldImmunizationWeek pic.twitter.com/HqBG6ABYuf

Fifty years ago, @WHO launched the Expanded Programme on Immunization, bringing countries together to provide children everywhere with vaccines. Since then, vaccination has saved an estimated 154 million lives. This #WorldImmunizationWeek is a reminder of the lifesaving power… pic.twitter.com/nmGQYrJvUf

Double-tap if you believe in the power of vaccines. Let's spread immunity, not diseases! . . #NationalImmunizationWeek pic.twitter.com/nBNi6geiTU

LIVE: Media briefing on #WorldImmunizationWeek and other global health issues with @DrTedros twitter.com/i/broadcasts/1BdGYroRXYNJX